1866. American Central Railway Company. Relief shown using hachures.;1 map, colored;40 x 115 cm.;ca. 1:1,200,000. J. Bien (New York).
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1867. Blanchard, Rufus, 1821-1904. Includes 14 lines of "Explanations" on congressional townships.;1 map, colored;97 x 63 cm.;1:1,267,200 or 20 miles to 1 inch. Rufus Blanchard (Chicago, Ill.).
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.
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.