61D. Part Of South Western Colorado.

Part Of South Western Colorado, Atlas Sheet 61 (D.). Issued Jan. 10th 1878. Weyss, Lang & Herman Del. Expeditions of 1873, 74, 75 & 76, Under the Command of 1st. Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army. Executive Officers and Field Astronomers: 1st. Lts., Corps of Engrs. W.L. Marshall and Eric Bergland. Topographical Assistants: J.C. Spiller and Louis Nell. U.S. Geographical Surveys West Of The 100th Meridian.

Wheeler, G.M.

1878

1876

U.S.

1:253 440

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