Coal gas

https://www.wikidata.org/wiki/Q842311

Field Hierarchy

Parent
Chemistry 28.9M papers	Engineering 25M papers	Geography 13.2M papers	Organic chemistry 12.9M papers
History 8M papers	Archaeology 6.9M papers	Waste management 1.6M papers	Coal 287k papers
Current
Coal gas 1,241 papers
Child

Trends

Notes

History