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Tables in the Text
Some Comments on Industry Structure
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aluminum amount annual AS&R asset average base metals basis bauxite beryllium Bureau of Mines capital value Census cent Cerro de Pasco depletion deductions development expenditures discount discovery DMEA domestic exploration drilling economic effect Engineering and Mining established estimate examination expansion exploration activity exploration and development exploration expenditures exploration program exploration ventures figures geological geophysical important income increase independent indicators initial interest investment large firm large number lead and zinc loans major firms metal mining metals exploration metals producers million mineral deposits minerals exploration mining companies mining industry Mining Journal molybdenum nickel non-ferrous metals output percentage depletion period Porphyry Coppers postwar present probability problem production profits properties prospecting prospectors public policy Report reserves Resources revenues risk sampling significant skimming smelting sources square mile success Survey tariff technological tion tungsten U. S. Congress U. S. Government Printing United uranium valuation vanadium