Biohydrometallurgical technologies : proceedings of an International Biohydrometallurgy Symposium held in Jackson Hole, Wyoming, USA, August 22-25, 1993. - Torma, Arpad E.; Wey, J. E. (John E.); Lakshmanan, V. I.; Apel, M. Lynn; Brierley, Corale L. (Minerals, Metals & Materials Society, 1993)