Title: Gold and silver: leaching, recovery and economics: proceedings from the 110th American Institute of Mining Engineers' meeting, Chicago, Illinois, February 22-26, 1981.  editors:  W.J. Schlitt, W.C. Larson, J.B. Hiskey
Subjects: Heap leaching, Gold, Metallurgy, Congresses, Silver mines and mining, Gold mines and mining, Silver