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Author/Creator
- Geological Survey (U.S.)[remove]789
- United States. Agency for International Development32
- Afghanistan. Department of Geological Survey31
- Afghanistan. Idārah-i ʻUmūmī-i Jiyūdīzī va Kārtūgrāfī31
- Davis, Philip A. (Philip Arthur), 1950-31
- Turner, Kenzie J.31
- United States. Federal Emergency Management Agency26
- United States. National Park Service18
- United States. National Oceanic and Atmospheric Administration17
- United States. Army. Corps of Engineers16
- National Water-Quality Assessment Program (U.S.)15
- Lombard, Pamela12
- Fowler, Kathleen K.10
- Chin, Edwin H.9
- Indiana. Department of Transportation9
- Indiana. Office of Community and Rural Affairs9
- Knowlton, Frank Hall, 1860-19267
- Southwest Florida Water Management District (Fla.)7
- U.S. Fish and Wildlife Service7
- United States. Bureau of Reclamation7