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- Geographic Subject: Indiana[remove]6
- Topical Subject: IGS Annual Reports6
- Topical Subject: Road materials6
- Topical Subject: Gravel3
- Geographic Subject: Bartholomew County (Ind.)1
- Geographic Subject: Clark County (Ind.)1
- Geographic Subject: Dearborn County (Ind.)1
- Geographic Subject: Decatur County (Ind.)1
- Geographic Subject: Floyd County (Ind.)1
- Geographic Subject: Fountain County (Ind.)1
- Geographic Subject: Harrison County (Ind.)1
- Geographic Subject: Jackson County (Ind.)1
- Geographic Subject: Jefferson County (Ind.)1
- Geographic Subject: Jennings County (Ind.)1
- Geographic Subject: Montgomery County (Ind.)1
- Geographic Subject: Ohio County (Ind.)1
- Geographic Subject: Pike County (Ind.)1
- Geographic Subject: Scott County (Ind.)1
- Geographic Subject: Switzerland County (Ind.)1
- Geographic Subject: Tippecanoe County (Ind.)1