Gannett, Henry, 1846-1914U.S. Geological survey. Thirteenth Annual Report, pl. 1.;1 map, colored;44 x 72 cm.;1:7,000,000JPEG2000https://digital.library.illinois.edu/items/a7c4ce20-994e-0134-2096-0050569601ca-aengU.S. Geological Survey (Washington, D.C.), [1893?]PublicMap of the United States showing the progress of the topographic survey during the fiscal year 1891-1892MapsUnited States18911892University of Illinois Urbana-Champaign