Geological Map of the Knoxville District. Clear Lake Region.

Geological Map of the Knoxville District. U.S. Geological Survey. Monograph XIII, Atlas Sheet V. Topography by J.D. Hoffman 1883. Geo. F. Becker, Geologist in charge. Topographical Map of the Region of Clear Lake. Compiled by C.F. Hoffmann. Geo. F. Becker, Geologist in charge.

Becker, George F.

1887

1887

United States Geological Survey

1:15 000

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