Author/Creator
- California. State Water Resources Control Board23
- Geological Survey (U.S.)10
- Geological Survey (U.S.), issuing body8
- California. Department of Water Resources5
- California. Central Valley Regional Water Quality Control Board4
- United States. Congress. House. Committee on Government Operations. Conservation and Natural Resources Subcommittee4
- Alpers, Charles N., 1958-3
- California. Dept. of Water Resources3
- Hamlin, Scott N.3
- Martin, Peter, 1953-3
- National Science Foundation (U.S.)3
- United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Water and Power Resources3
- United States. Congress. House. Committee on Natural Resources. Subcommittee on Water and Power3
- United States. Environmental Protection Agency3
- United States. General Accounting Office3
- Yates, Eugene B.3
- Burchard, J. M.2
- California Regional Water Quality Control Board--Lahontan Region2
- California Regional Water Quality Control Board--North Coast Region2
- California Regional Water Quality Control Board--San Francisco Bay Region2