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- Museum number:
- 1-98233
- Object class:
- Shell samples
- Collector:
- Francis A. Riddell, Harry Starr Riddell Sr., and Kitty Joaquin
- Collection place:
- CA-Sac-28 (Strawberry Mound), Sacramento, Sacramento County
- Collection date:
- August 1940
- Museum number:
- 1-98232
- Object class:
- Shell samples
- Collector:
- Francis A. Riddell, Harry Starr Riddell Sr., and Kitty Joaquin
- Collection place:
- CA-Sac-28 (Strawberry Mound), Sacramento, Sacramento County
- Collection date:
- August 1940
- Museum number:
- 1-197850
- Object class:
- Mineral and rock samples
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-163, Mud Flat, Lassen County
- Collection date:
- April 1956
- Museum number:
- 1-103784
- Object class:
- Mineral and rock samples
- Collector:
- Francis A. Riddell and Harry Starr Riddell Jr.
- Collection place:
- CA-Las-9 (Madeline Dunes site), Madeline Plains, Lassen County
- Collection date:
- 1948
- Museum number:
- 1-101484
- Object class:
- Botanical samples
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Las-1, Lassen County, California
- Collection date:
- February 1949
- Museum number:
- 1-74852
- Object class:
- Botanical samples
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Las-1, Lassen County, California
- Collection date:
- unknown
- Museum number:
- 1-81586
- Object class:
- Botanical samples
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Las-1, Lassen County, California
- Collection date:
- January 1942
- Museum number:
- 1-101483
- Object class:
- Botanical samples
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Las-1, Lassen County, California
- Collection date:
- February 1949
- Museum number:
- 1-81572
- Object class:
- Botanical samples
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Las-1, Lassen County, California
- Collection date:
- January 1942
- Museum number:
- 1-101661
- Object class:
- Botanical samples
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Las-1, Lassen County, California
- Collection date:
- February 1949