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M. L. Byram et Molokomme, I. M.,
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WHO -Geneva, CH, World Health Organization et Edna McConnell Clark Foundation -New York, NY, US,
« Primary health care level management of trachoma ». World Health Organization (WHO), Geneva, Switzerland, p. ii, 42 p. : fig., 1993.
N. Directorat NA,
« The REO's work manual : getting closer to the rural communities ». Namibia, Directorate of Rural Development, Windhoek, Namibia, p. xi, 66 p. : ill., 1993.
K. D. Kerri,
« Small water system operation and maintenance : a field study training program », vol. no. 1. California State University, Office of Water Programmes, Sacramento, CA, USA, p. x, 578 p. : fig., incl. 2 posters, 1993.