1915. Iowa. Board of Railroad Commissioners. 8 miles = 1 inch; 1 map Material in the public domain. No restrictions on use. University of Iowa. Libraries. Map Collection. Rand McNally and Company.
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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.