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Filters: Author is Helvetas -Nugegoda, LK  [Clear All Filters]
1994
L. K. Helvetas - Nugegoda y Moratuwa, L. K. Sarvodaya, «Construction of hand-dug well in rural villages in Sri Lanka». Helvetas, Swiss Association for Development and Cooperation, Nugegoda, Sri Lanka, p. 41 p. : tech. drwng., 1994.
L. K. Helvetas - Nugegoda y Moratuwa, L. K. Sarvodaya, «Construction of latrines in rural villages in Sri Lanka». Helvetas, Swiss Association for Development and Cooperation, Nugegoda, Sri Lanka, p. 22 p. : tech. drwng., 1994.
L. K. Helvetas - Nugegoda y Moratuwa, L. K. Sarvodaya, «Design, construction and standardisation of gravity water supply systems in rural villages in Sri Lanka». Helvetas, Swiss Association for Development and Cooperation, Nugegoda, Sri Lanka, p. 77 p. + annexes : tech drwngs., 1994.
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