Photocatalytic purification and treatment of water and air: Proceedings of the 1st International conference on TiO2 photocatalytic purification and treatment of water and air, London, ON, Canada, 8–13 November 1992: Edited by D. Ollis, North Carolina State University, Raleigh, NC, USA and H. Al-Ekabi, Nutech Environmental, London, ON, Canada Trace Metals in the Environment Volume 3 (Elsevier Science Publishers, Amsterdam, 1993), ISBN 0-444-89855-7; 820 pages; price: Dfl. 450.00 (US $257.25)