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Geomagnetism
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Indiana, United States
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Image
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Year
1950
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1. Total intensity aeromagnetic map of Gibson County, Indiana: relative to arbitrary datum
1950. Henderson, John R., cartographer. Includes text and location map. Scale approximately 1:63,360.
2. Total intensity aeromagnetic map of St. Joseph County, Indiana: relative to arbitrary datum
1950. Dempsey, W. J., cartographer. Includes text and location map. Scale approximately 1:64,000.