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Letter From George Otis Smith, U.S. Geological Survey to Carl Hayden

ContributorsSmith, George Otis (Author)
Created1918-04-23
Description

Letter from George Otis Smith, U.S. Geological Survey to Carl Hayden regarding asbestos mining prospects in the Grand Canyon.

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Letter From George Otis Smith, U.S. Geological Survey to Carl Hayden

ContributorsSmith, George Otis (Author)
Created1918-05-01
Description

Letter from George Otis Smith to Carl Hayden regarding mining rights in the Grand Canyon.

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Trails, Rails, and Roadways in Pima County: Sonoran Desert Conservation Plan

ContributorsBott, Suzanne (Author) / Pima County (Ariz.). County Administrator's Office (Publisher)
Created2002-01-07
Description

Describes the evolution of transportation routes and transportation methods in Pima County throughout time, and the effect that modes of transportation have had on the size and form of the community. Stage, freight, and railroad transportation followed the main historic corridors established by previous cultures and technologies.