Report upon United States Geographical surveys west of the one hundredth meridian
A. A. Humphreys, chief of engineers until June 1879. Succeeded by H. G. Wright. Date of publication for vol. 2. Astronomy and barometric hypsometry: 1877 (t.p.) Available also through the Library of Congress Web site as a raster image. Form AACR2: ga10 2004-03-02
Contributor:
Wright, Horatio Gouverneur - Wheeler, George M. (George Montague) - Humphreys, A. A. (Andrew Atkinson) - Geographical Surveys West of the 100th Meridian (U.S.)