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U.S. Geological Survey (1951)

U.S. Geological Survey (Washington: U.S. Geological Survey, 1955)

Scale 1:31,680. Map is from U.S. Geological Survey; Professional Paper 267. Size of original printed map height 29 inches, width 19.75 inches.

U.S. Geological Survey (1951)

U.S. Geological Survey (1951)

U.S. Geological Survey (1951)

Includes vegetation overprint.

U.S. Geological Survey (1951)

Includes vegetation overprint.

U.S. Geological Survey (1951)

U.S. Geological Survey (1956)

U.S. Geological Survey (1950)

U.S. Geological Survey (1950)