Online link | http://pubs.usgs.gov/ds/321/ |
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Description | Aeromagnetic surveys of Illinois, Indiana, and Ohio, merged to form seamless grids across the state. Gravity anomaly data are provided as well. |
Originators | Daniels, David L.; Kucks, Robert P.; and Hill, Patricia L. |
Publication | U.S. Geological Survey Data Series DS-321 |