Petroleum industry

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

Field Hierarchy

Parent
Biology 36M papers	Engineering 25M papers	Geology 10.4M papers	Environmental science 8.8M papers
Paleontology 5.5M papers		Environmental engineering 971k papers
Current
Petroleum industry 27.3k papers
Child
Midstream 1,721 papers		Natural gas industry 1,534 papers

Trends

Notes

History