D. General fo DGIS,
The Netherlands and the Third World : rural development. The Hague, The Netherlands: Netherlands, Ministry of Foreign Affairs, DGIS, Information Department, 1989, p. 47 p.: photogr.
M. McGarry, Sultana, F., Carr, C., y Butt, I.,
«Programme for the improvement of low-cost sanitation in Balochistan townships». Cowater International, Winnipeg, Man, Canada, p. v, 65 p.: tab., 1989.
UN-HABITAT -Nairobi, KE, United Nations Human Settlements Programme, Economic Development Institute -Washington, DC, US, y Delhi, I. N. National I.,
Urban management in Asia : issues and opportunities. New Delhi, India: National Institute of Urban Affairs, 1989, p. vi, 184 p.: fig., tab.
P. Evans,
«Water and sanitation sector review and action plan 1990 - 95». National Steering Committee International Drinking Water Supply and Sanitation Decade, Maseru, Lesotho, p. 65 p.: fig., 1989.
IUCN -Gland, CH, International Union for Conservation of Nature, Gland, C. H. W. W. F. -, y Nairobi, K. E. U. N. E. P. -,
«World conservation strategy for the 1990s». World Conservation Union (IUCN), Gland, Switzerland, p. vi, 160 p.: tab., 1989.