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- Museum number:
- 1-148202
- Object class:
- Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-7, Karlo area, Lassen County
- Collection date:
- 1955
- Museum number:
- 1-197565
- Object class:
- Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- CA-ElD-44, El Dorado County, California
- Collection date:
- March 1956
- Museum number:
- 1-197984
- Object class:
- Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-68, Secret Valley, Lassen County
- Collection date:
- August 31, 1955
- Museum number:
- 1-115031
- Object class:
- Hammerstones
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-48, Lassen County, California
- Collection date:
- July 23, 1948
- Museum number:
- 1-93632
- Object class:
- Hammerstones
- Collector:
- Francis A. Riddell and Richard Shutler Jr.
- Collection place:
- CA-Las-83, Lassen County, California
- Museum number:
- 1-115158
- Object class:
- Hammerstones
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-52, Lassen County, California
- Museum number:
- 1-201850
- Object class:
- Ground stone and Pestles
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-100, Mud Flat, Lassen County
- Collection date:
- September 13, 1954