Skillings Mining Review, 1961, Two years to strip Mission copper mine: Skillings Mining Review, v. 50, no. 49, p. 12. Authors Skillings Mining Review Publication Date 1961 Citation Skillings Mining Review, v. 50, no. 49, p. 12. State AZ Province BR County PM Placenames Sierrita Mts. Keywords Mineral District Porphyry Copper Mining Engineering More Keywords Mineral District, Porphyry Copper, Mining Engineering, AzGeoBib RefNum 9414