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- Museum number:
- 1-114791
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-33, Long Valley, Lassen County
- Collection date:
- July 23, 1949
- Museum number:
- 1-99930
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell, James Allan Bennyhoff, Richard Shutler Jr., and W. R. Ash
- Collection place:
- CA-Las-100, Mud Flat, Lassen County
- Museum number:
- 1-114835
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-32, Petes Valley, Lassen County
- Collection date:
- August 9, 1949
- Museum number:
- 2-31546
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- NV-Wa-47, Washoe County, Nevada
- Museum number:
- 1-99900
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell, James Allan Bennyhoff, Richard Shutler Jr., and W. R. Ash
- Collection place:
- CA-Las-68, Secret Valley, Lassen County
- Collection date:
- July 1951
- Museum number:
- 1-100968
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr, David Allen Fredrickson, and Francis A. Riddell
- Collection place:
- CA-Sta-9, Stanislaus County, California
- Collection date:
- October 1943
- Museum number:
- 1-99835
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-54, Lassen County, California
- Museum number:
- 1-108250
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 12, 1949
- Museum number:
- 1-198069
- 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:
- 1-202794
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and James Allan Bennyhoff
- Collection place:
- CA-Las-17, Lassen County, California