Cite
MLA (8th Edition)
Maps of the Bonsall Area of the San Luis Rey River Valley, San Diego County, California Showing Geology, Hydrology, and Ground-Water Quality. Department of the Interior, United States Geological Survey, Open-File Services Section, Western Distribution Branch, 1985.
APA (7th Edition)
Maps of the Bonsall area of the San Luis Rey River Valley, San Diego County, California showing geology, hydrology, and ground-water quality. (1985). Department of the Interior, United States Geological Survey, Open-File Services Section, Western Distribution Branch.
Chicago (17th Edition)
“Maps of the Bonsall Area of the San Luis Rey River Valley, San Diego County, California Showing Geology, Hydrology, and Ground-Water Quality.” Sacramento, Calif.: Department of the Interior, United States Geological Survey, Open-File Services Section, Western Distribution Branch, 1985.