61C. Part Of Southwestern Colorado.

Part Of Southwestern Colorado, Atlas Sheet 61 (C.). Weyss, Lang & Herman Del. Expeditions of 1873-74-75 & 77 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, 2nd Lt., 3rd Artillery, C.W. Whipple. Topographical Assistants: Louis Nell 1873-74-77, J.C. Spiller 1874-1875. U.S. Geographical Surveys West Of The 100th Meridian.

Wheeler, G.M.

1878

1876

U.S.

1:253 440

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