G. E. Nepomuceno,
« Village water program ». Philippines, Ministry of Local Governments and Community Development, Quezon City, The Philippines, p. 40 p.: fig., 1980.
W. Baumann et Karpe, H. J.,
Wastewater treatment and excreta disposal in developing countries : report on a research project. Eschborn, Germany: German Appropriate Technology Exchange (GATE) /Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ), 1980, p. 167 p.: fig.
IDRC -Ottawa, Ont., CA, International Development Research Centre,
« Wastewater treatment and resource recovery : report of a workshop on high-rate algae ponds, Singapore, 27-29 February 1980 ». International Development Research Centre (IDRC), Ottawa, Ont, Canada, p. 47 p., 1980.
M. Falkenmark, Lindh, G., De Mare, L., et Widstrand, C.,
Water conflicts and research priorities, vol. no. 2. Oxford, UK: Pergamon, 1980, p. viii, 199 p. : fig., tab.
V. Williams,
« Water treatment plant operation (rapid sand filter) : a training/job manual ». Pan American Health Organization, Division of Environmental Health Protection, Bridgetown, Barbados, p. 72 p.: fig., 1980.