- Burroughs, H. N.1
- Butler, James, 1863-18641
- California Geological Survey1
- California. Board of State Harbor Commissioners for San Francisco Harbor1
- California. Department of Conservation1
- California. Department of Public Works1
- California. Division of Mines and Geology1
- California. Office of State Engineer1
- California. State Earthquake Investigation Commission1
- Callahan, Denis1
- Campbell, Robert, Lieutenant1
- Carey, Mathew, 1760-18391
- Cheffins, Charles F.1
- Chevalier, August, 1871-1
- Churchman, Joseph and James1
- Clark, William, 1770-18381
- Coastal and Marine Geology Program (Geological Survey)1
- Codazzi, Agustin, 1793-18591
- County of Santa Clara. Geographic Information Services1
- Cruchley, G.F.1
