"Bureau of the Census--1930.", Imprint: Washington, D.C. : U.S. G.P.O., 1930., Scale: 1:500,000; Dimensions: 93 x 61 cm, Coordinates: W0880700 W0844500 N0414500 N0375200
United States. Bureau of the Census (1930). Indiana minor civil divisions. United States. Government Printing Office. https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00430 (map)