61B. Central Colorado.

Central Colorado. Atlas Sheet 61(B). Weyss, Rock & Nell, Del. Expeditions of 1873, 74, 75, 76 & 79 Under the Command of Capt. Geo. M. Wheeler, Corps of Engineers, U.S. Army. Executive Officers & Field Astronomers: 1st. Lith., Corps of Eng'rs. W.L. Marshall and Eric Belgrade. Topographical Assistants: Louis Nell and J.S. Young 1873,74, 76 & 79 and J.S. Spiller, 1875. U.S. Geographical Surveys West Of The 100th Meridian.

Wheeler, G.M.

1879

1876

U.S.

1:253 440

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