Born-Digital or AnalogAnalogTranscriptMining. Machinery. Detailed article with plans and drawings of western mining ore processing mills. Part II. Narrow Gauge and Short Line Gazette Ja/F 1978 v.3 #6.p.52 Description of railroad depot in Ophir, colorado. served by Rio Grande Southern Railroad. Track Diagram and plans of mining tramhouse next to depot Narrow Gauge and Short Line Gazette Myi'Je 1978 v.4 #2 p.36CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng
