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Author/Creator
- Geological Survey (U.S.)153
- Maps.com (Firm)63
- Walsh, Gregory J.13
- Drake, Avery Ala, 1927-8
- New Jersey Geological Survey8
- Ratcliffe, Nicholas M. (Nicholas Morley), 1938-7
- Vermont Geological Survey7
- Gardner, James V.6
- National Atlas & Thematic Mapping Organisation (India)6
- United States. Central Intelligence Agency6
- Ensminger, Paul A.5
- Louisiana. Department of Transportation and Development. Water Resources Section5
- Massachusetts. Geological Survey5
- USGS-NOAA Joint Office for Mapping and Research in the EEZ5
- Burton, William C. (William Chapin), 1952-4
- Chadwick, William W.4
- Huizinga, Richard J.4
- Iowa. Department of Natural Resources4
- Kohn, Michael S.4
- Linhart, S. Mike4