Geological map of Wisconsin.

Geological map of Wisconsin. Compiled by T.C. Chamberlin, State Geologist. Published by Snyder, Van Vechten & Co., Milwaukee. Copyright 1877, by Snyder, Van Vechten & Co.

Snyder, Van Vechten & Co.

1878

1878

Snyder, Van Vechten & Co.

1:1 520 640

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