Book reviews : Welch,E. B. 1980: Ecological effects of waste water. Cambridge: Cambridge University Press. xii + 337 pp. £ 15.00 cloth,£5.50 paper

Park, C.C. 1980: Ecology and environmental management—a geographical perspective. Folkestone: Dawson Westview Press. (272 pp.)

Reid, K. 1969: Nature's networks. London: Aldus Books. (188 pp.)