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Author
- California Geological Survey18
- Marshall, Gerald18
- Mendes, Eric18
- California. Department of Conservation16
- Instituto Brasileiro de Geografia e EstatÃstica5
- Stanford Geospatial Center4
- University of Arizona. Library4
- California. Dept. of Conservation.2
- International Association of Seismology and Physics of the Earth's Interior2
- International Heat Flow Commission2
- Oklahoma State University. Department of Geography. Cartography Service2
- Cao, Changyong1
- Circuit Rider Productions1
- Earle, Carville1
- Heppen, John1
- Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology.1
- Otterstrom, Samuel1
- Parvis, M.1
- University of Chicago Social Science Research Committee1
- Vermeule, Cornelius Clarkson1