Copper 91-Cobre 91 International Symposium Ottawa, Ont., Metallurgical Society of CIM, Instituto de Ingenieros de Minas de Chile, Minerals, Metals and Materials Society, Conference of Metallurgists, & Hydrometallurgical Meeting. (1991). Proceedings of the Copper 91-Cobre 91 International Symposium: August 18-21, 1991, Ottawa, Canada. Pergamon Press.

Copper 91-Cobre 91 International Symposium Ottawa, Ont., Metallurgical Society of CIM, Instituto de Ingenieros de Minas de Chile, Metals and Materials Society Minerals, Conference of Metallurgists, and Hydrometallurgical Meeting. Proceedings of the Copper 91-Cobre 91 International Symposium: August 18-21, 1991, Ottawa, Canada. New York [N.Y.]: Pergamon Press, 1991.

Copper 91-Cobre 91 International Symposium Ottawa, Ont., et al. Proceedings of the Copper 91-Cobre 91 International Symposium: August 18-21, 1991, Ottawa, Canada. Pergamon Press, 1991.