- Groundwater Basins for Marin County. Data was downloaded from http://gis.ca.gov/data_index.epl and reprojected from NAD 27 meters. Attributes not needed for the Countywide Plan were deleted.
- San Rafael (Calif.). County Of Marin.
- Marin County (Calif.)
- Hydrology, Groundwater Basins, Environment, and Farming
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