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You searched for: Date Created 1950 Remove constraint Date Created: 1950 Publisher Geological Survey (U.S.) Remove constraint Publisher: Geological Survey (U.S.) Subject Topical Subject: Geomagnetism Remove constraint Subject: Topical Subject: Geomagnetism

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  • Total intensity aeromagnetic map of DuBois County, Indiana relative to arbitrary datum
  • Total intensity aeromagnetic map of Elkhart County, Indiana relative to arbitrary datum