- International Association of Seismology and Physics of the Earth's Interior51
- International Heat Flow Commission51
- Oklahoma State University. Department of Geography. Cartography Service51
- 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
- Monterey County (Calif.)4
- Navarro, Fernando4
- Powell, Susan4
- Rosenberg, Lewis I.4
- International Livestock Research Institute3
- Arndt, Raymond E.2
- Bawiec, Walter J.2
- Beikman, Helen M.2
- Fire and Resource Assessment Program (Calif.)2
- King, Philip B.2
