R. H. Kuhlthau,
“Country studies in appropriate sanitation alternatives”, vol. 6. World Bank, Washington, DC, USA, p. ii, 176 p.: fig., map, tab., 1979.
World Bank -Washington, DC, US,
“Eight case studies of rural and urban fringe areas in Latin America”. World Bank, Energy, Water and Telecommunications Department, Washington, DC, USA, p. 230 p.: fig., tab., 1979.
P. W. Potts, Moh, K. C., Whipple, J. H., and Craft, T. F.,
“Final report on the utilization/evaluation of an aid hand-operated water pump”. Georgia Institute of Technology, Atlanta, GA, USA, p. x + 147 p. : fig., tab., 1979.