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Publisher
- Geological Survey (U.S.)77
- Bay Area Open Space Council73
- Circuit Rider Productions68
- Gap Analysis Program (U.S.)60
- University of Minnesota. Institute on the Environment48
- Monterey County (Calif.)33
- California. Department of Fish and Game. Marine Resources Region28
- Ocean Tipping Points Project28
- Northeast Ocean Data23
- National Geophysical and Solar-Terrestrial Data Center19
- United States. Bureau of Transportation Statistics19
- Santa Clara County (Calif.). Planning Office18
- County of Santa Cruz Information Services Department17
- Hart Energy Publishing14
- County of San Mateo Information Services Department12
- National Atlas of the United States12
- California. Air Resources Board11
- California. Division of Mines and Geology11
- Science11
- World Resources Institute11