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«Como fabricar un tipo de molino de viento a bajo costo para bombeo de agua», vol. no. l12. Servicio Nacional de Aprendizaje (SENA), Bogota, Colombia, p. 23 p.: techn.drawings, graphs, 1977.
IRC International Water and Sanitation Centre, The Hague, NL,
«International workshop on hand pumps for water supply, Voorburg (The Hague), The Netherlands, 12-16 July 1976 : report», vol. no. 8. IRC, The Hague, The Netherlands, p. 30 p. : photogr., 1977.
R. G. Koegel,
Self-help wells, vol. no. 30. Rome, Italy: Food and Agriculture Organization (FAO), 1977, p. 78 p. : 56 fig., photogr.