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Publisher
- California. Department of Water Resources123
- Kōgyō Gijutsuin Chishitsu Chōsajo,4
- Canada Centre for Mapping and Earth Observation3
- Santa Clara Valley Water District (Calif.)3
- The Survey,2
- Bundesanstalt für Geowissenschaften un Rohstoffe ;1
- Dept. of Water Affairs, Ministry of Energy and Water Development, Zambia ;1
- Geological Survey (U.S.)1
- Ministerio de Oo. Pp., Servicio Geologico Nacional,1
- U.S. Geological Survey ;1
- U.S. Geological Survey,1