Shear Waves in Sediments (Proceedings of the Conference on Shear Waves in Sediments, La Spezia, Italy, 15-19 October 1990). J.M. Hovem, M.D. Richardson and D.R. Stou (Editors), Kluwer, Dordrecht, 1991, 593 pp., hardback, #98(Dfl.295/US$164), ISBN: 0 7923