29 Jeffrey Jordan, “Population, Environment and Development: Proceedings of the United Nations Expert Group Meeting on Population, Environment and Development, New York, 1992”, Society and Natural Resources, vol. 9, No. 5, 1996, pp. 556-557.
Jeffrey Jordan, « Population, Environment and Development: Proceedings of the United Nations Expert Group Meeting on Population, Environment and Development, New York, 1992 », Society and Natural Resources, vol.  9, No 5, 1996, p.  556 et 557.