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Subject
- Topical Subject: IGS Annual Reports7
- Topical Subject: Mines and mineral resources5
- Topical Subject: Geology4
- Geographic Subject: Clark County (Ind.)3
- Topical Subject: Fortification2
- Topical Subject: Mounds2
- Topical Subject: Stone walls2
- Geographic Subject: Bone Bank Site (Ind.)1
- Geographic Subject: Floyd County (Ind.)1
- Geographic Subject: Gibson County (Ind.)1
- Geographic Subject: Knox County (Ind.)1
- Geographic Subject: Lawrence County (Ind.)1
- Geographic Subject: North Rhine-Westphalia (Germany)1
- Geographic Subject: Ohio River1
- Geographic Subject: Posey County (Ind.)1
- Geographic Subject: Warren County (Ind.)1
- Topical Subject: Antiquities1
- Topical Subject: Caves1
- Topical Subject: Coal mines and mining1
- Topical Subject: Mississippian culture1