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Subject
- Topical Subject: Mines and mineral resources[remove]46
- Topical Subject: IGS Annual Reports38
- Topical Subject: Geology26
- Geographic Subject: Indiana25
- Topical Subject: Geology, Stratigraphic21
- Topical Subject: Soils4
- Geographic Subject: Ohio3
- Geographic Subject: Clay County (Ind.)2
- Geographic Subject: Fayette County (Ind.)2
- Geographic Subject: Fountain County (Ind.)2
- Geographic Subject: Monroe County (Ind.)2
- Geographic Subject: Parke County (Ind.)2
- Geographic Subject: Vigo County (Ind.)2
- Topical Subject: Coal2
- Topical Subject: Coal mines and mining2
- Topical Subject: Limestone2
- Topical Subject: Road materials2
- Topical Subject: Sandstone2
- Topical Subject: Shale2
- Geographic Subject: Attica (Ind.)1