G.W. & C.B. Colton & Co.1 mapTIFF7181224file name: 31858062319433.tifbarcode: 31858062319433islandora: sheetmaps_38(OCoLC)60247262https://digital.lib.uiowa.edu/node/235914engG.W. & C.B. Colton & Co.PublicMap of the Union Pacific Railroad and its connections, 1867MapsIowa1860-1870University of Iowa