1919. United States. Post Office Department. Includes "List of Counties in Iowa" index. 83 x 126 centimeters Scale [1:440,000] General Map Collection. Postmaster General (Washington).
1876. Nicholson, W. L. (Topographer). Longitude west from Washington, D.C. Stated on map: "Designed and constructed under the orders of Postmaster General Marshall Jewell and Second Ass... Post Office Dept.; Washington, D.C.?.
1886. University of Iowa. Libraries. Map Collection and Warner & Foote. Image from Warner & Foote's 1886 Plat book of Allamakee County, Iowa p.6, showing a map of Postville, Iowa. Warner & Foote.
1923. Iowa. Highway Commission. Condition January 1, 1923. 57 x 88 centimeters Scale [approximately 1:633,000] 10 miles to 1 inch General Map Collection. Iowa Highway Commission (Ames, Iowa).
2010. Geological Survey (U.S.). This polygon shapefile portrays the Public Land Surveys of the United States, including areas of private survey, donation land claims, and land gra... Geological Survey (U.S.).
1886. University of Iowa. Libraries. Map Collection and Warner & Foote. Image from Warner & Foote's 1886 Plat book of Allamakee County, Iowa p.48-49, showing a railroad section map of Iowa. Warner & Foote.