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- Museum number:
- 12-9478+A,B
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Yol-13 (Mustang Mound), Yolo County, California
- Collection date:
- 1958
- Museum number:
- 12-7960
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- Summer 1949
- Museum number:
- 12-10020+A
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Yol-13 (Mustang Mound), Yolo County, California
- Collection date:
- 1958
- Museum number:
- 12-9692
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Yol-13 (Mustang Mound), Yolo County, California
- Collection date:
- 1958
- Museum number:
- 12-9495
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Yol-13 (Mustang Mound), Yolo County, California
- Collection date:
- 1958
- Museum number:
- 12-11174
- Collector:
- Francis A. Riddell and Harry Starr Riddell Sr.
- Collection place:
- CA-Sac-112 (Calquhoun Mound 2), Sacramento County, California
- Collection date:
- 1941
- Museum number:
- 12-7974
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- Summer 1949
- Museum number:
- 12-10013
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Yol-13 (Mustang Mound), Yolo County, California
- Collection date:
- 1958
- Museum number:
- 12-9471+A
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Yol-13 (Mustang Mound), Yolo County, California
- Collection date:
- 1958
- Museum number:
- 12-9914+A
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-7, Karlo area, Lassen County
- Collection date:
- June 1955