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Publisher
- United States Geological Survey7
- Geological Survey (U.S.)4
- Geological Survey Division (Urbana, Ill.)4
- Ohio. Division of Geological Survey2
- American Geographical Society of New York1
- Central Intelligence Agency1
- Geological Survey and Water Resources (Rolla, Mo.)1
- Indiana Geological Survey1
- Minnesota Geological Survey1
- Naval Oceanographic Office1
- The Board1
- W.S. McAlpine Map Co.1