Book reviews : Dunne,T. and Leopold,L .B. 1978: Water in environmental planning. San Francisco: W. H.| Freeman. xxvii + 818 pp. £17.40

Daniels, R.B. 1960: Entrenchment of the Willow drainage ditch, Harrison county, Iowa. American Journal of Science 258, 161-76.

Keller, E.A. 1976: Channelisation: environmental, geomorphic and engineering aspects. In Coates, D. R. , editor, Geomorphology and engineering, Stroudsburg, Pennsylvania : Dowden, Hutchinson and Ross, 115-40.

Leopold, L.B. , Wolman, M.G. and Miller, J.P. 1964: Fluvial processes in geomorphology. San Francisco: Freeman. (522 pp.)

Linsley, R.K. , Kohler, M.A. and Paulhus, J.L.H. 1949: Applied hydrology. New York : McGraw-Hill. (689 pp.)

Schumm, S.A. 1969: River metamorphosis. Proceedings of the American Society of Civil Engineers, Journal of the Hydraulics Division 95, 255-73.

Ward, R.C. 1975: Principles of hydrology, second edition. London: McGraw-Hill. (365 pp.)