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- Museum number:
- 1-104931
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- June 23, 1949
- Museum number:
- 1-128931
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Adán Eduardo Treganza, Dorothy Menzel, and Francis A. Riddell
- Collection place:
- CA-Sta-44 (Farmington site), Stanislaus County, California
- Collection date:
- May 12, 1951
- Museum number:
- 1-114886
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-40, Susanville, Lassen County
- Museum number:
- 1-99912
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell, James Allan Bennyhoff, Richard Shutler Jr., and W. R. Ash
- Collection place:
- CA-Las-71, Lassen County, California
- Collection date:
- July 1951
- Museum number:
- 1-106890
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 3, 1949
- Museum number:
- 1-115735
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- Inyo County, California
- Collection date:
- July 12, 1949
- Museum number:
- 1-101709
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, Francis A. Riddell, and James Allan Bennyhoff
- Collection place:
- CA-Sta-6, Stanislaus County, California
- Collection date:
- February 1949
- Museum number:
- 1-100964
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-8, Stanislaus County, California
- Collection date:
- October 1943
- Museum number:
- 1-109769
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 25, 1949
- Museum number:
- 1-100976
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-9, Stanislaus County, California
- Collection date:
- October 1943
- Museum number:
- 1-100993
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-12, Stanislaus County, California
- Collection date:
- October 1948
- Museum number:
- 1-115001
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-47, Lassen County, California
- Collection date:
- July 23, 1949
- Museum number:
- 1-108504
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 17, 1949
- Museum number:
- 16-8194
- Culture or time period:
- Valdivia culture (ca. 3500-1500 BC)
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Dorothy Menzel and Francis A. Riddell
- Collection place:
- Manta Beach site, Ecuador
- Collection date:
- February 28, 1954
- Museum number:
- 1-115285
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-56, Lassen County, California
- Museum number:
- 1-109988
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 28, 1949
- Museum number:
- 1-202813
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Ker-1, Kern County, California
- Museum number:
- 1-101046
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-17, Stanislaus County, California
- Collection date:
- October 1943
- Museum number:
- 1-101748
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, Francis A. Riddell, and James Allan Bennyhoff
- Collection place:
- CA-Sta-5, Stanislaus County, California
- Collection date:
- February 1949
- Museum number:
- 1-100910
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-4, Stanislaus County, California
- Collection date:
- October 1943
- Museum number:
- 1-197612
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-ElD-44, El Dorado County, California
- Collection date:
- March 1956
- Museum number:
- 1-109938
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 27, 1949
- Museum number:
- 1-106911
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 3, 1949
- Museum number:
- 1-100337
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Fre-29, Fresno County, California
- Collection date:
- Summer 1948
- Museum number:
- 1-202044
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-33, Long Valley, Lassen County
- Collection date:
- July 1951
- Museum number:
- 1-115412
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-69, Secret Valley, Lassen County
- Collection date:
- August 8, 1949
- Museum number:
- 1-99816
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-29, Honey Lake Valley, Lassen County
- Museum number:
- 1-109772
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 25, 1949
- Museum number:
- 1-115282
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-56, Lassen County, California
- Museum number:
- 1-116369
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-322, Bodega Harbor, Sonoma County
- Museum number:
- 1-100956
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-7, Stanislaus County, California
- Collection date:
- October 1943
- Museum number:
- 1-114686
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-17, Lassen County, California
- Museum number:
- 1-100070
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Fre-9, Fresno County, California
- Collection date:
- Summer 1948
- Museum number:
- 1-102392
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, Francis A. Riddell, and William Harland Kinsey
- Collection place:
- CA-Sta-13, Stanislaus County, California
- Collection date:
- March 1949
- Museum number:
- 1-100870
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-SJo-1, San Joaquin County, California
- Collection date:
- October 1943
- Museum number:
- 1-100003
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Fre-2, Fresno County, California
- Collection date:
- Summer 1948
- Museum number:
- 1-115276
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-56, Lassen County, California
- Museum number:
- 1-78791
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr and Francis A. Riddell
- Collection place:
- CA-Lak-30, Lake County, California
- Museum number:
- 1-148677
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-7, Karlo area, Lassen County
- Collection date:
- 1955
- Museum number:
- 1-115288
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-56, Lassen County, California
- Museum number:
- 1-79037
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr and Francis A. Riddell
- Collection place:
- CA-Lak-30, Lake County, California
- Museum number:
- 1-93727
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and Richard Shutler Jr.
- Collection place:
- CA-Las-30, Lassen County, California
- Museum number:
- 1-100891
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-1, Stanislaus County, California
- Collection date:
- October 1943
- Museum number:
- 1-198070
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-13 (Horse Lake site), Horse Lake, Lassen County
- Collection date:
- July 1955
- Museum number:
- 1-115105
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-49, Lassen County, California
- Museum number:
- 1-117364
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-345, Sonoma County, California
- Museum number:
- 1-100977
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-10, Stanislaus County, California
- Collection date:
- October 1948
- Museum number:
- 1-108523
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 17, 1949
- Museum number:
- 1-115343
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-65, Lassen County, California
- Collection date:
- August 5, 1949
- Museum number:
- 1-78577
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr and Francis A. Riddell
- Collection place:
- CA-Lak-30, Lake County, California