Petroleum industry

https://www.wikidata.org/wiki/Q862571

Field Hierarchy

Parent
Biology 36.8M papers	Engineering 25.7M papers	Geology 10.6M papers	Environmental science 9M papers
Paleontology 5.6M papers		Environmental engineering 997k papers
Current
Petroleum industry 27.9k papers
Child
Midstream 1,795 papers		Natural gas industry 1,545 papers

Trends

Notes

History