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1858

Geological Map ... Rio Colorado of the W …

Exploration Book

Geological Map No. 1. Prepared by J.S. N …

1858

Geological Map ... Rio Colorado of the W …

Exploration Book

Geological Map No. 2. Prepared by J.S. N …

1874

A geological map of the Black Hills: by …

Exploration Book

A geological map of the Black Hills: by …