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Author
Cao, Changyong
21
Earle, Carville
21
Heppen, John
21
Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology.
21
Otterstrom, Samuel
21
National Atlas of the United States
9
Geological Survey (U.S.)
6
Geographic Data Technology, Inc. (GDT)
2
United States. Geological Survey
2