Born-Digital or AnalogAnalogTranscriptMining. Machinery Brochure describing method for separating gold from sand and gravel with Mahan Gold Saving Machine. Clips: Mining. Machinery Subterranean Tools, Inc., 3 year old firm aims at $3 million sales volume in boring machinery for mining industry. Post Mr 3, 1974 p.79 Detailed article with plans of Western mining ore processing mills. Part I. Narrow Gauge and Short Line Gazette N 1977 v.3 #5 p.40CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
