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