Subject
- Geographic Subject: Owen County (Ind.)8
- Geographic Subject: Union County (Ky.)8
- Geographic Subject: Bartholomew County (Ind.)6
- Geographic Subject: Johnson County (Ind.)6
- Geographic Subject: Martin County (Ind.)6
- Geographic Subject: Perry County (Ind.)6
- Geographic Subject: Daviess County (Ky.)5
- Geographic Subject: Elkhart County (Ind.)5
- Geographic Subject: Harrison County (Ind.)5
- Geographic Subject: Lawrence County (Ill.)5
- Geographic Subject: Madison County (Ind.)5
- Topical Subject: Geomagnetism5
- Geographic Subject: Berrien County (Mich.)4
- Geographic Subject: Breckinridge County (Ky.)4
- Geographic Subject: Brown County (Ind.)4
- Geographic Subject: Crawford County (Ill.)4
- Geographic Subject: Darke County (Ohio)4
- Geographic Subject: Edwards County (Ill.)4
- Geographic Subject: Gallatin County (Ill.)4
- Geographic Subject: Meade County (Ky.)4