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Map of the Gadsden Purchase : Sonora and portions of New Mexico, Chihu...
Relief shown by hachures. LC copy signed in ink on page 2 of cover: Millard Fillmore, Feby. 6, 1861. Includes notes. Available also through the Library of Congress Web site as a raster image.
Unites States Territorial Acquisitions
Created by an act of Congress in 1879, the USGS has evolved over the ensuing 125 years, matching its talent and knowledge to the progress of science and technology. The USGS is the sole science agency for the D... More