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- Museum number:
- 1-99830
- Object class:
- Drills (stone tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-29, Honey Lake Valley, Lassen County
- Museum number:
- 1-239519
- Object class:
- Drills (stone tools)
- Collector:
- Francis A. Riddell, Harry Starr Riddell Sr., and Kitty Joaquin
- Collection place:
- CA-Las-9 (Madeline Dunes site), Madeline Plains, Lassen County
- Collection date:
- unknown
- Museum number:
- 1-238748
- Object class:
- Drills (stone tools)
- Dimensions:
- length 4.5 centimeters
- Collector:
- Francis A. Riddell and Harry Starr Riddell Jr.
- Collection place:
- CA-Sac-21 (Hollister Mound), Sacramento County, California
- Collection date:
- unknown
- Museum number:
- 1-115688
- Object class:
- Drills (stone tools)
- Collector:
- Otto Hansen
- Collection place:
- CA-Las-9 (Madeline Dunes site), Madeline Plains, Lassen County
- Collection date:
- 1948
- Museum number:
- 1-93795
- Object class:
- Drills (stone tools)
- Collector:
- Francis A. Riddell and Richard Shutler Jr.
- Collection place:
- CA-Las-89, Lassen County, California
- Museum number:
- 1-115634
- Object class:
- Drills (stone tools)
- Collection place:
- Lassen County, California
- Museum number:
- 1-145438
- Object class:
- Drills (stone tools)
- Collector:
- Francis A. Riddell and James Francis Riddell
- Collection place:
- CA-Las-7, Karlo area, Lassen County
- Collection date:
- November 26-28, 1954
- Museum number:
- 1-115178
- Object class:
- Drills (stone tools)
- Collector:
- Francis A. Riddell and William S. Evans Jr.
- Collection place:
- CA-Las-53, Lassen County, California
- Museum number:
- 1-197975
- Object class:
- Drills (stone tools)
- Collector:
- Francis A. Riddell
- Collection place:
- CA-Las-68, Secret Valley, Lassen County
- Collection date:
- August 31, 1955
- Museum number:
- 1-97901
- Object class:
- Drills (stone tools)
- Collector:
- Otto Hansen
- Collection place:
- Lassen County, California
- Collection date:
- unknown