Metallurgical applications of bacterial leaching and related microbiological phenomena: L.E. Murr, A.E. Torma and J.A. Brierley (Editors). Academic Press, New York, N.Y., 1978, 526 pp., U.S. $ 25.00 or £ 16.25 (Proceedings of an International Symposium which took place at the New Mexico Institute of Mining and Technology, Socorro, N.M., August 3–5, 1977)