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- Bituminous coal--Pennsylvania--Maps1,141
- Gas wells--Pennsylvania--Maps1,141
- Oil wells--Pennsylvania--Maps1,141
- New Jersey Environmental Digital Library30
- Geology, Structural20
- Joints (Geology)20
- Local transit15
- Agriculture7
- Historical Maps of New Jersey5
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- Pedestrians3
- Automobiles2
- Railroads2
- Map collections1