D. D. Mara,
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UNICEF -New York, NY, US,
«The good news is water». UNICEF, Radio, Television and Film Services, New York, NY, USA, p. film (30 min.): 16 mm, 1984.
M. Le Clere y Sherer, K.,
«A workshop design for latrine construction : a training guide», vol. no. 25. Water and Sanitation for Health Project (WASH), Arlington, VA, USA, p. v, 272, 127 p.: fig., 1984.