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- Geographic Subject: Gibson County (Ind.)[remove]47
- Geographic Subject: Wabash County (Ill.)22
- Geographic Subject: Knox County (Ind.)21
- Geographic Subject: Pike County (Ind.)11
- Geographic Subject: Vanderburgh County (Ind.)10
- Geographic Subject: Posey County (Ind.)8
- Topical Subject: Vegetation mapping8
- Geographic Subject: Lawrence County (Ill.)5
- Geographic Subject: Warrick County (Ind.)5
- Geographic Subject: White County (Ill.)5
- Topical Subject: IGS Annual Reports5
- Geographic Subject: Edwards County (Ill.)4
- Topical Subject: Geology4
- Geographic Subject: Dubois County (Ind.)3
- Geographic Subject: Indiana2
- Geographic Subject: Spencer County (Ind.)2
- Topical Subject: Coal2
- Topical Subject: Gas wells2
- Topical Subject: Landowners2
- Topical Subject: Oil wells2