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- Geographic Subject: Indiana[remove]6
- Topical Subject: Coal6
- Topical Subject: Geology6
- Topical Subject: IGS Annual Reports6
- Geographic Subject: Gibson County (Ind.)2
- Geographic Subject: Putnam County (Ind.)2
- Geographic Subject: Benton County (Ind.)1
- Geographic Subject: Clay County (Ind.)1
- Geographic Subject: Crawford County (Ind.)1
- Geographic Subject: Daviess County (Ind.)1
- Geographic Subject: Dubois County (Ind.)1
- Geographic Subject: Fountain County (Ind.)1
- Geographic Subject: Knox County (Ind.)1
- Geographic Subject: Lawrence County (Ind.)1
- Geographic Subject: Martin County (Ind.)1
- Geographic Subject: Montgomery County (Ind.)1
- Geographic Subject: Newton County (Ind.)1
- Geographic Subject: Orange County (Ind.)1
- Geographic Subject: Owen County (Ind.)1
- Geographic Subject: Parke County (Ind.)1