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Subject
- Real property34
- Sediments (Geology)12
- Landowners11
- Groundwater9
- Geology8
- Oil wells8
- Continental shelf6
- Railroads6
- Roads6
- Land grants4
- Petroleum4
- Administrative and political divisions3
- Gas wells3
- Indians of North America3
- Oil fields3
- Residential real estate3
- Aquifers2
- Boundaries2
- Cities and towns2
- Geology, Stratigraphic2
