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Published online by Cambridge University Press: 25 April 2022
1 Dasmann, R. F., Milton, J. P. and Freeman, P. H., Ecological Principles for Economic Development Wiley (1937) p.15.Google Scholar
2 Unesco, Teacher's Study Guide on the Biology of Human Populations - Africa (l975) ch.10.Google Scholar
3 Dasman et al, op cit, p.17.
4 Dasman et al, op cit, p . 1 .
5 Dasman et al, op cit, pp.22-3.