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Subject
- Topical Subject: IGS Annual Reports[remove]32
- Topical Subject: Mines and mineral resources16
- Topical Subject: Geology12
- Topical Subject: Coal mines and mining9
- Topical Subject: Geology, Economic4
- Geographic Subject: Daviess County (Ind.)3
- Geographic Subject: Indiana3
- Topical Subject: Caves3
- Topical Subject: Coal3
- Topical Subject: Geology, Stratigraphic3
- Geographic Subject: Clark County (Ind.)2
- Geographic Subject: Martin County (Ind.)2
- Geographic Subject: Sullivan County (Ind.)2
- Geographic Subject: Vigo County (Ind.)2
- Geographic Subject: Wyandotte Cave (Ind.)2
- Topical Subject: Landowners2
- Topical Subject: Mounds2
- Topical Subject: Real property2
- Geographic Subject: Bone Bank Site (Ind.)1
- Geographic Subject: Brown County (Ind.)1