Recent books on genotoxicity: Induced mutagenesis (edited by C W Lawrence), pp 433. Plenum Press, New York and London, 1983, ISBN 0-306-41163-6; Indicators of Genotoxic Exposure (Banbury Report No 13) (edited by B A Bridges, B E Butterworth and 1B Weinsteins), pp 580. Cold Spring Harbor Laboratory, 1982, ISBN 0-87969-212-X; Genetic Toxicology (edited by R A Fleck and A Hollaender), pp 550, Plenum Press, 1982, ISBN 0-306-41135-0