- International Association of Seismology and Physics of the Earth's Interior43
- International Heat Flow Commission43
- Oklahoma State University. Department of Geography. Cartography Service43
- California Geological Survey16
- California. Department of Conservation14
- Marshall, Gerald14
- Mendes, Eric14
- Geological Survey (U.S.)13
- Environmental Systems Research Institute (Redlands, Calif.)11
- National Atlas of the United States8
- Rosenberg, Lewis I.5
- Monterey County (Calif.)4
- Arndt, Raymond E.2
- Bawiec, Walter J.2
- Beikman, Helen M.2
- Fire and Resource Assessment Program (Calif.)2
- King, Philip B.2
- Schruben, Paul G.2
- Blackburn, Laura1
- Hopkins Marine Station1
