Author/Creator
- Ortiz, A. G.10
- Pettijohn, Robert A.10
- St. Johns River Water Management District (Fla.)10
- Mississippi. Office of Land and Water Resources9
- South Florida Water Management District (Fla.)9
- United States. Bureau of the Census. Geography Division9
- Wheeler, Judith C.9
- AM (Publisher)7
- Gage, Thomas, 1721-17877
- Mississippi. Bureau of Land and Water Resources7
- National Regional Aquifer Systems Analysis Program (U.S.)7
- Schomburg Center for Research in Black Culture7
- United States Coast Survey7
- United States. Bureau of the Census7
- United States. National Aeronautics and Space Administration7
- Yerkes, R. F., 1923-7
- Appalachian Regional Commission6
- Campbell, Russell H., 1928-6
- Darden, Daphne6
- Dixon, Joann6