-- See Also the narrower term Mines and mineral resources Here are entered works on the potential economic value of minerals or the technical aspects of locating and removing them from the earth. Works on the industries based on the extraction, processing, and commercialization of minerals are entered under Mineral industries. Works on the geochemical or geological aspects of naturally formed inorganic and organic compounds are entered under Minerals. --headings beginning with the words Mine and Mining
-- See Also the narrower term Power resources Here are entered works on the available sources of mechanical power in general. Works on the physics and engineering aspects of power are entered under Power (Mechanics).
-- See Also the narrower term Water-supply Here are entered works on water resources both superficial and underground, primarily for domestic, manufacturing, or agricultural purposes. --subdivision Water-supply under topical headings
