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Filters: Keyword is ecological sanitation and Author is Calvert, P.  [Clear All Filters]
Calvert, P., Seneviratne, A., Premakumara, D.G.J., y Mendis, U.A., «Ecological sanitation a success in Sri Lanka», Waterlines, an international journal of water, sanitation and waste, pp. p. 22-24 : 4 boxes, 1 fig., 4 photogr., 2002.
Calvert, P. y Nghien, P.S., «Appraisal of the Vinsanres eco-san toilet demonstration project 1997-2000». Viet Nam, Ministry of Health, Hanoi, Viet Nam, p. 58 p. : tabs., 2000.
Calvert, P., «Compost toilets : practical action, technology challenging poverty». The Schumacher Centre for Technology and Development, Rugby, UK, p. 5 p. : 1 fig.