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Start Over Author Hildenbrand, T. G. Publisher Dept. of Energy and Natural Resources, Illinois State Geological Survey

1. Total intensity magnetic anomaly map of Illinois

Yale Public content
1993. 2007-04-18T14:25:50Z. 2011-06-03T19:38:14Z. Hildenbrand, T. G. Dept. of Energy and Natural Resources, Illinois State Geological Survey. English. Public. Illinois.

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