Born-Digital or AnalogAnalogTranscriptMining. Accidents, Colorado Colorado's underground inferno. (Hastings explosion). Denver Westerners Roundup v.24 #4 Ap 1968 p.3-15 4 miners dead in Somerset coal mine collapse. Post S 20, 1968 p.1,3 RMN S 20, 1968 p.5 History of mine disasters in Colorado. RP,ND9, 1968_o.61 Collapse of mine entrance kills miner near Buena Vista. RMN Ag 23, 1969 p.34CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
