information about Oil and natural gas field
Field Hierarchy
| Parent | |||
|---|---|---|---|
Biology 36.7M papers | Chemistry 29.4M papers | Engineering 25.6M papers | Organic chemistry 13.1M papers |
Ecology 8.3M papers | Waste management 1.6M papers | Fossil fuel 103k papers | |
| Current | |||
Oil and natural gas 2,013 papers | |||
| Child | |||
Trends
Notes
History