Geographical Surveys West of the 100th Meridian (U.S.)Sheet no. 61(C) from Wheeler's Geographical exploration and surveys west of the 100th meridian topographical atlas.; Relief shown by contours, hachures, and spot heights.; Expeditions of 1874 and 1875 under the command of 1st Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army--Margin.; 1st Lieut. W.L. Marshall, Corps of Engineers, U.S. Army, Executive Office and Field Astronomer--Margin.; Louis Nell, J.C. Spiller, topographical assistants--Margin.; Louis Nell, Del.--Margin.37 x 49 centimeters, on sheet 49 x 62 centimetersJPEGUMN_ALMA:9931968370001701eng(Washington, D.C)PublicS.W. Colorado, San Juan mining region : atlas sheet no. 61(C)MapsDistrict of Columbia--WashingtonDistrict of ColumbiaUniversity of Minnesota