Title of article :
Ecology of tropical food production : By N. J. T. Norman, C. J. Pearson and P. G. E. Searle. ISBN 0 521 41062 2. (430 pp; £45.00 [$69.95] hardback); ISBN 0 521 42264 7 (£19.95 [$29.95] paperback). Cambridge, UK, Cambridge University Press, 1995
