Biblio

Wollschied, “Handpump corrosion in deep bore-holes”, Low-cost pumping systems, pp. p. 1-3: tab., 1990.

Wollschied, “Why handpumps break down”, Low-cost pumping systems, pp. p. 4-6: fig., 1990.

O. Langenegger, “The impact of handpump corrosion on water quality”. World Bank Regional Water and Sanitation Group Western Africa, Abidjan, Ivory Coast, p. 10 p.: fig., tab., 1987.

P. V. Hebert and Yniguez, C., “Sensitivity of water distribution costs to design and service standards : a Philippine case study”, vol. no. 16. World Bank, Washington, DC, USA, p. iv, 32 p. : fig., tab., 1986.

C. Pieck, Catchment and storage of rainwater. Amsterdam, The Netherlands: TOOL, 1985, p. 52 p.: fig.