US Department of Labor, Standard Industrial Classification Manual 1987… (1987 | noyear)
“ The production of coal fuel briquettes and packaged fuel is classified in Manufacturing, Industry 2999. Establishments primarily engaged in the production of gas and hydrocarbon liquids from coal at the mine site are classified in Major Group 13. Industry Group 122: Bituminous Coal And Lignite Mining 1221 Bituminous Coal and Lignite Surface Mining 1222 Bituminous Coal Underground Mining Industry Group 123: Anthracite Mining 1231 Anthracite Mining Industry Group 124: Coal Mining Services 1241 Coal Mining Services This text is taken from the Standard Industry Classification 1987 (index) . ”
