- National Atlas of the United States33
- Geological Survey (U.S.)24
- Georgia. National Agency for Public Registry13
- Arndt, Raymond E.10
- Bawiec, Walter J.10
- Beikman, Helen M.10
- King, Philip B.10
- National Geophysical Data Center10
- Schruben, Paul G.10
- Geological Survey (U.S.) Minerals Information Team9
- Godt, Jonathan W.3
- Hijmans, Robert J.3
- Gap Analysis Program (U.S.)2
- Kelso, Nathaniel Vaughn2
- Patterson, Tom2
- Blackburn, Laura1
- Canada Centre for Mapping1
- Eastern Energy Resource Surveys Team (Geological Survey)1
- Geological Survey (U.S.). Water Resources Division. Wisconsin District1
- Global Resource Information Database1
