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Asamblea Plenaria del Consejo de Colaboración de ACE (1989 : Sophia-Antipolis, France) ,  World Health Organization. Community Water Supply and Sanitation Unit ,  Asamblea Plenaria del Consejo de Colaboración de ACE, Sophia-Antipolis, Francia, 28 noviembre - 1 diciembre 1989

ESA Collaborative Council Meeting (1989: Sophia Antipolis, France) ,  World Health Organization. Community Water Supply and Sanitation Unit ,  [ESA Collaborative Council Meeting, Sophia Antipolis, France, 28 November - 1 December 1989]

International Drinking Water Supply and Sanitation Decade ,  World Health Organization. Community Water Supply and Sanitation Unit ,  [Catalogue of external support, 3d ed]

International Drinking Water Supply and Sanitation Decade ,  World Health Organization. Community Water Supply and Sanitation Unit ,  [Catalogue des organismes de soutien extérieurs, 3a éd]