Book reviews: Gerrard,A.J. 1981: Soils and landforms. An integration of geomorphology and pedology. London: George Allen and Unwin. xviii + 219 pp. £15.00 cloth,£7.95 paper

Dan, J. and Yaalon, D.H. 1968: Pedomorphic forms and pedomorphic surfaces. Transactions of the Ninth International Congress of Soil Science, Adelaide 4, 577-84.

Huggett, R.J. 1975: Soil landscape systems: a model of soil genesis . Geoderma 13,1-22.

Nikiforoff, C.C. 1959: A reappraisal of the soil. Science 129, 186-96.

Roy, A.G. , Jarvis, R.S. and Arnett, R.R. 1980: Soil-slope relationships within a drainage basin . Annals of the Association of American Geographers 70, 397-412.

Ruhe, R.V. and Walker, P.H. 1968: Hillslope models and soil formation. I. Open systems. Transactions of the Ninth International Congress of Soil Science , Adelaide 4, 551-60.

Simonson, R.W. 1959: Outline of a generalized theory of soil genesis . Proceedings of the Soil Science Society of America 23, 152-56.

Vreeken, W.J. 1973: Soil variability in small loess watersheds: clay and organic matter content. Catena 1, 181-96.

1975a: Variability of depth to carbonates in fingertip loess watersheds in Iowa. Catena 2, 321-36.

1975b: Principal kinds of chronosequences and their significance in soil history. Journal of Soil Science 26, 378-94.