-- See Also the narrower term Chemical industry Here are entered works on industries that produce chemicals or are based on chemical processes. Works on individual chemical industries are entered under specific headings, e.g. Sulphuric acid industry.
-- See Also the narrower term Defense industries Here are entered works on industries producing war weapons, supportive equipment, and supportive services.
-- See Also the narrower term Mineral industries Here are entered works on the industries based on the extraction, processing, and commercialization of minerals. Works on the geochemical or geological aspects of naturally formed inorganic and organic compounds are entered under Minerals. Works on the potential economic value of minerals or the technical aspects of locating and removing them from the earth are entered under Mines and mineral resources.
