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- Museum number:
- 1-115710
- Object class:
- Abraders
- Collector:
- Otto Hansen
- Collection place:
- Secret Valley, Lassen County, California
- Collection date:
- 1948
- Museum number:
- 1-115383
- Object class:
- Arrow shaft smoothers
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-67, Lassen County, California
- Collection date:
- August 8, 1949
- Museum number:
- 1-115708
- Object class:
- Blades (stone tools)
- Collector:
- Otto Hansen
- Collection place:
- Secret Valley, Lassen County, California
- Collection date:
- 1948
- Museum number:
- 1-114698
- Object class:
- Blades (stone tools) and Fragments (object portions)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-21, Secret Valley, Lassen County
- Museum number:
- 1-115521
- Object class:
- Bone tools
- Collector:
- Otto Hansen
- Collection place:
- Secret Valley, Lassen County, California
- Collection date:
- 1948
- Museum number:
- 1-115343
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-65, Lassen County, California
- Collection date:
- August 5, 1949
- Museum number:
- 1-115366
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-66, Lassen County, California
- Collection date:
- August 5, 1949
- Museum number:
- 1-115364
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-66, Lassen County, California
- Collection date:
- August 5, 1949
- Museum number:
- 1-115365
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-66, Lassen County, California
- Collection date:
- August 5, 1949
- Museum number:
- 1-115412
- Object class:
- Choppers (prehistoric cutting tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-69, Secret Valley, Lassen County
- Collection date:
- August 8, 1949