Modern converter practices at Magna Copper / K.L. Driggs. Warrendale, Pa. : Minerals, Metals & Materials Society, [1991?] IN: EPD Congress (1991 : New Orleans, La.) / Proceedings ; p. 265-269.
Plant practices and innovations at Magna Copper Company's San Manuel SX-Ew plant Warrendale, Pa. : Minerals, Metals & Materials Society, [1991?] IN: EPD Congress (1991 : New Orleans, La.) / Proceedings ; p.239-252.