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- Museum number:
- 1-165927
- Object class:
- Carbonized
- Collector:
- Francis A. Riddell and Harry Starr Riddell Jr.
- Collection place:
- CA-Sac-45, Sacramento County, California
- Collection date:
- 1938-1939
- Museum number:
- 1-239320
- Object class:
- Charred
- Collector:
- Francis A. Riddell and Harry Starr Riddell Jr.
- Collection place:
- CA-Sac-45, Sacramento County, California
- Collection date:
- 1951
- Museum number:
- 1-74875
- Object class:
- Botanical samples
- Collector:
- Francis A. Riddell and Franklin Fenenga
- Collection place:
- CA-Las-1, Lassen County, California
- Collection date:
- August 21, 1940