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- Museum number:
- 1-101684
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Albert Mohr, Francis A. Riddell, and James Allan Bennyhoff
- Collection place:
- CA-Sta-6, Stanislaus County, California
- Collection date:
- February 1949
- Museum number:
- 1-128953
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Adán Eduardo Treganza, Dorothy Menzel, and Francis A. Riddell
- Collection place:
- CA-Sta-45, Stanislaus County, California
- Collection date:
- May 12, 1951
- Museum number:
- 2-29970
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- NV-Wa-46, Washoe County, Nevada
- Museum number:
- 1-109398
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Arnold R. Pilling, Francis A. Riddell, and Franklin Fenenga
- Collection place:
- CA-Son-299, Bodega Harbor, Sonoma County
- Collection date:
- July 19, 1949
- Museum number:
- 1-99791
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-15, Lassen County, California
- Collection date:
- June-July 1951
- Museum number:
- 1-99793
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-15, Lassen County, California
- Collection date:
- June-July 1951
- Museum number:
- 2-31536
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- NV-Wa-47, Washoe County, Nevada
- Museum number:
- 2-31538
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- NV-Wa-47, Washoe County, Nevada
- Museum number:
- 2-31535
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- NV-Wa-47, Washoe County, Nevada
- Museum number:
- 2-31534
- Object class:
- Choppers (prehistoric cutting tools) and Hammerstones
- Collector:
- Francis A. Riddell
- Collection place:
- NV-Wa-47, Washoe County, Nevada