G.W. & C.B. Colton & Co.1 mapScale [ca. 1:6,400,000]W 126°--W 70°/N 44°--N 36°JPEGui:sheetmaps_38engG.W. & C.B. Colton & Co.PublicMap of the Union Pacific Railroad and its connections, 1867Maps1860-1870University of Iowa