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Author/Creator
- Geological Survey (U.S.)2
- Balster, Clifford A.1
- Earthquake Hazards Program (Geological Survey)1
- Enos, Paul, 1934-1
- Food and Agriculture Organization of the United Nations1
- Geological Society of America1
- Unesco1
- United States. Bureau of the Census1
- United States. Bureau of the Census. Agriculture Division1
- United States. Bureau of the Census. Geography Division1