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- Object[106]
- yes[106]
- no[106]
- american[106]
- bainbridge (pennsylvania)[12]
- berks county[2]
- brandywine[2]
- bucks county[2]
- chester county[2]
- chickies[2]
- conoy township[2]
- dauphin county[1]
- delaware county (pennsylvania)[3]
- delaware river[2]
- doylestown[2]
- forge island[2]
- lancaster county (pennsylvania)[86]
- markham[3]
- marsh run[2]
- monroe county (pennsylvania)[2]
- pennsylvania[106]
- rock retreat[2]
- united states of america[106]
- washington boro[3]
- witmer's farm[27]
- york[1]
- york county (pennsylvania)[1]
- argillaceous material[106]
- shale[1]
1 - 32 of 106 Records
1 - 32 of 106 Records