"Color reproduction by Bureau of Agricultural Economics, U.S.D.A." "8-31-40." Includes chart showing type of land use, acreage, and recommended use., Imprint: [Washington, D.C.?] : U.S. Bureau of Agricultural Economics, [1940], Scale: Scale not given.; Dimensions: 25 x 12 cm, on sheet 39 x 28 cm, Coordinates: W0865527 W0864056 N0385416 N0382941
Martin County (Ind.). Land Use Planning Committee (1940). Martin County Indiana preliminary land use map. United States. Bureau of Agricultural Economics. https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00782 (map)