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Filters: Keyword is hand digging and Author is Steiner, U.  [Clear All Filters]
1985
R. Stark y Steiner, U., «Manual for the construction of handdug drinking water wells in Sarvodaya villages in Sri Lanka». Helvetas, Swiss Association for Development and Cooperation, Moratuwa, Sri Lanka, p. 34 p.: fig., 1985.
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