Coal liquefaction

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

Field Hierarchy

Parent
Biology 34.8M papers	Physics 31.7M papers	Chemistry 28.4M papers	Engineering 23.9M papers
Biochemistry 13.3M papers	Organic chemistry 12.8M papers	Geography 11.1M papers	Geology 9.1M papers
Ecology 7.8M papers		History 7M papers
Current
Coal liquefaction 4,335 papers
Child
Carbochemistry 1,127 papers

Trends

Notes

History