Publisher
- Geological Survey (U.S.)72
- Bay Area Open Space Council26
- California. Department of Fish and Game. Marine Resources Region13
- County of Santa Cruz Information Services Department4
- Monterey County (Calif.)4
- National Atlas of the United States3
- California. Division of Mines and Geology1
- County of San Mateo Information Services Department1
- Food and Agriculture Organization of the United Nations1
- National Geophysical Data Center1
- U.S. Fish and Wildlife Service1