Total intensity aeromagnetic map of St. Joseph County, Indiana relative to arbitrary datum
Description
Includes text and location map., Imprint: [Washington, D.C.] : For sale by U.S. Geological Survey, 1950, Dimensions: 60 x 74 cm; Scale: Approximately 1:64,000, Coordinates: W0863135 W0860333 N0414538 N0412601
Dempsey, W. J., cartographer. (1949). Total intensity aeromagnetic map of St. Joseph County, Indiana relative to arbitrary datum. Geological Survey (U.S.). https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-00321 (map)