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- National Atlas of the United States49
- Geological Survey (U.S.)37
- Boundary Solutions, Inc.20
- National Geophysical Data Center10
- Geological Survey (U.S.) Minerals Information Team9
- Platts9
- United States Coast Survey.8
- Bush, Charles A.5
- Geographic Data Technology, Inc. (GDT)5
- NOAA Paleoclimatology Program (U.S.)5
- Reed, John Calvin, Jr. 1930-5
- World Data Center for Paleoclimatology5
- EROS Data Center4
- ESRI4
- Millroy, J. J.4
- U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch3
- Burk, Creighton A.2
- Gap Analysis Program (U.S.)2
- Godt, Jonathan W.2
- Helm, J. R.2