United States. Mississippi River Commission63 maps;360,000." "Contour lines are five feet apart.";56 x 92 cm.;1:20,000JPEG2000https://digital.library.illinois.edu/items/908c1cd0-82d4-0134-1f08-0050569601ca-2engMississippi River Commission (St. Louis, Mo.)PublicSurvey of the Mississippi River [map] / made under the direction of the Mississippi River Commission.MapsMississippi River Region1911-1915University of Illinois Urbana-Champaign