Subject
- Geographic Subject: Martin County (Ind.)6
- Geographic Subject: Parke County (Ind.)6
- Geographic Subject: Vigo County (Ind.)6
- Topical Subject: Oil wells6
- Topical Subject: Quarries and quarrying6
- Topical Subject: Shale6
- Topical Subject: Stratigraphic correlation6
- Geographic Subject: Fountain County (Ind.)5
- Geographic Subject: Gibson County (Ind.)5
- Geographic Subject: Jefferson County (Ind.)5
- Geographic Subject: Perry County (Ind.)5
- Geographic Subject: Warrick County (Ind.)5
- Topical Subject: Gravel5
- Geographic Subject: Clark County (Ind.)4
- Geographic Subject: Dearborn County (Ind.)4
- Geographic Subject: Kosciusko County (Ind.)4
- Geographic Subject: Ohio4
- Geographic Subject: Orange County (Ind.)4
- Geographic Subject: Spencer County (Ind.)4
- Geographic Subject: Vermillion County (Ind.)4