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- Museum number:
- 1-198066
- 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:
- 2-31547
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- NV-Wa-47, Washoe County, Nevada
- Museum number:
- 1-197999
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-69, Secret Valley, Lassen County
- Collection date:
- August 31, 1955
- Museum number:
- 1-148213
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-7, Karlo area, Lassen County
- Collection date:
- 1955
- Museum number:
- 1-148677
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-7, Karlo area, Lassen County
- Collection date:
- 1955
- Museum number:
- 1-198070
- 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:
- 1-197940
- 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 14, 1955
- Museum number:
- 1-197057
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-7, Karlo area, Lassen County
- Collection date:
- 1955
- Museum number:
- 2-29965
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- NV-Wa-46, Washoe County, Nevada
- Museum number:
- 1-196922
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-7, Karlo area, Lassen County
- Collection date:
- 1955