Biblio

F. Sargent, Human ecology. Amsterdam, The Netherlands: North-Holland Publishing Company, 1974, p. xii, 475 p. : fig., tab.

K. Probst, Hagmann, J., Fernandez, M., and Ashby, J., “Understanding participatory research in the context of natural resource management - paradigms, approaches and typologies”, vol. No. 130. Overseas Development Institute, Agricultural Research & Extension Network, London, UK, p. 15 p. : 2 box., 1 tab.

M. El-Ashry, Saab, N., and Zeitoon, B., “Water : sustainable management of a scarce resource ”, vol. 3. Arab Forum for Environment and Development, AFED, S.l., p. xxii, 222 p.; refs.; tab.; fig.