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Subject
- Utilities and Communication7
- Inland Waters3
- Gas fields2
- Oil fields2
- Oil wells2
- Petroleum2
- Planning and Cadastral2
- Public lands2
- Surveying2
- Carbon Dioxode1
- Climatology, Meteorology and Atmosphere1
- Drilling Platforms1
- Gas wells1
- Natural Gas1
- Natural gas1
- Offshore gas1
- Oil and gas leases1
- Pipelines1
- Shipping1
- Transportation1