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Author/Creator
- United States. Bureau of the Census18
- United States. Bureau of the Census. Geography Division13
- Geological Survey (U.S.)7
- Archer, J. Clark5
- Parsons, Stanley B.4
- Beach, William W.3
- DeFranco, Laurence J.3
- Diefenderfer, William Martin, 1945-3
- Lilley, William3
- Martis, Kenneth C.3
- Mieczkowski, Yanek3
- United States. Central Intelligence Agency3
- ebrary, Inc3
- Arrowsmith, John, 1790-18732
- Bernan Press2
- Center for Responsive Politics (Washington, D.C.)2
- Congressional Quarterly, inc2
- Dubin, Michael J.2
- Hermann, Dan2
- Irish Academic Press2