Born-Digital or AnalogAnalogTranscriptMining. Equipment Method of talking through rock is a breakthrough in mine rescue by Westinghouse Electric Corp. and Bureau of Mines. Post Ja 14, 1971 p.32 History of early American miner's lamp. Denver Westerners Roundup v.31 #2 F 1975 p.3-12 Hard rock drilling contests featured. True West v.29 #4 Ap 1982 p.52-55 Finnish Mining Sales Firm opens office in Commerce City. denver business journal DBJ N 14, 1988 p.8CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
