Shows soil types classification by colors and symbols. , "Surveyed in 1938. Series 1938.", Imprint: [Washington, D.C.?] : Bureau of Soils, [1938?], Scale: 1:31,680; Dimensions: 115 x 125 cm, on sheets 126 x 93 cm, Coordinates: W0863100 W0860300 N0414600 N0412600
Ulrich, H. P. (Herbert Paul), 1904-cartographer. (1938). Soil map, St. Joseph County, Indiana. United States. Bureau of Soils. https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00081 (map)