Strip-mine regulation and reclamation: an attitude survey Author N.N.Reddy Article Date March 1974 Journal Title Ariz Rev
Silent stamp mills Author L.Schoenfeld Article Date March 1969 Article Abstract Good picture and brief description of a stamp mill Journal Title Desert
Choppers' save the day in tough assignment Article Date September 13, 1959 Article Abstract Helicopters take equipment to an inaccessible drilling site Journal Title Ariz Days & Ways