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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:
- 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:
- 1-99835
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-54, Lassen County, California
- 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
- Museum number:
- 1-114853
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-36, Lassen County, California
- Museum number:
- 1-93653
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and Richard Shutler Jr.
- Collection place:
- CA-Las-85, Rices Canyon, Lassen County
- Collection date:
- January-February 1951
- Museum number:
- 1-78770
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Albert Mohr and Francis A. Riddell
- Collection place:
- CA-Lak-30, Lake County, California