Shows soil types classification by colors and symbols. Soils surveyed by Grove B. Jones and Cornelius Van Duyne. "Field operations Bureau of Soils 1908.", Imprint: [Washington, D.C.?] : The Bureau, [1908], Scale: 1:63,360; Dimensions: 61 x 71 cm, Coordinates: W0852018 W0844810 N0411616 N0405459
Jones, Grove B., 1877- cartographer. (1908). Soil map Indiana, Allen Co. sheet. United States. Bureau of Soils. https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00423 (map)