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- Rhode Island Water Resources Coordinating Board,21
- U.S. Dept. of the Interior, U.S. Geological Survey,4
- U.S. Geological Survey ;3
- BGR ;2
- Florida Geological Survey,2
- Iowa Geological Survey,2
- Louisiana Geological Survey,2
- Massachusetts Water Resources Commission,2
- U.S. Geological Survey,2
- Chishitsu Chōsajo]1
- Commonwealth of Massachusetts, Water Resources Commission,1
- Nevada Bureau of Mines and Geology, University of Nevada,1
- The Bureau,1
- U.S. Department of the Interior, U.S. Geological Survey,1
- U.S. Dept. of the Interior, U.S. Geological Survey ;1
- U.S. Geological Survey :1
- UNESCO ;1
- University of the State of New York, State Education Dept.,1
- Zhongguo di tu chu ban she,1