Coal liquefaction

https://www.wikidata.org/wiki/Q221979

Field Hierarchy

Parent
Biology 36.7M papers	Physics 33.6M papers	Chemistry 29.4M papers	Engineering 25.6M papers
Biochemistry 13.8M papers	Geography 13.4M papers	Organic chemistry 13.1M papers	Geology 10.6M papers
Ecology 8.3M papers		History 8.1M papers
Current
Coal liquefaction 4,673 papers
Child
Carbochemistry 1,185 papers

Trends

Notes

History