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Author
- National Atlas of the United States33
- Geological Survey (U.S.)24
- Cao, Changyong16
- Earle, Carville16
- Heppen, John16
- Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology.16
- Otterstrom, Samuel16
- 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
- Gap Analysis Program (U.S.)3
- Godt, Jonathan W.3
- Blackburn, Laura1
- Canada Centre for Mapping1
- Eastern Energy Resource Surveys Team (Geological Survey)1
- Geological Survey (U.S.). Water Resources Division. Wisconsin District1