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Author/Creator
- United States. Central Intelligence Agency12
- Earthquake Hazards Program (Geological Survey)3
- Geological Survey (U.S.)3
- American Digital Cartography1
- Appalachian Regional Commission1
- Association of American State Geologists1
- Hughes, William, 1818-18761
- Landslide Hazard Reduction Program (Geological Survey)1
- National Cooperative Geologic Mapping Program (U.S.)1
- United States. Army Service Forces1
- United States. Army Service Forces. Information and Education Division1
- United States. Army Service Forces. Morale Service Division1
- United States. Army Service Forces. Special Service Division1
- United States. Bureau of the Census. Geography Division1
- United States. National Oceanic and Atmospheric Administration1