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Operation and Maintenance Working Group. Meeting (1994: Geneva, Switzerland) ,  World Health Organization. Division of Operational Support in Environmental Health ,  [Proceedings of the Operation and Maintenance Working Group Meeting, Geneva, 31 May - 3 June 1994]

Water Supply and Sanitation Collaborative Council. Working Group on Promotion of Sanitation. Meeting (1st: 1994: Thun, Switzerland) ,  World Health Organization. Division of Operational Support in Environmental Health ,  [The problem of sanitation / Water Supply and Sanitation Collaborative Council Working Group on Promotion of Sanitation, 15 March 1994, Draft ed]

Water Supply and Sanitation Collaborative Council. Working Group on Promotion of Sanitation. Meeting (1st: 1994: Thun, Switzerland) ,  World Health Organization. Division of Operational Support in Environmental Health ,  [Versión preliminar] ,  El Problema del saneamiento : Consejo de Colaboración sobre Abastecimiento de Agua y Saneamiento / Grupo de Trabajo sobre Promoción del Saneamiento, 15 de marzo de 1994

Water Supply and Sanitation Collaborative Council. Working Group on Promotion of Sanitation. Meeting (1st: 1994: Thun, Switzerland) ,  World Health Organization. Division of Operational Support in Environmental Health ,  [Le Problème de l' assainissement : conseil de concertation pour l' approvisionnement en eau et l' assainissment / Groupe de travail sur la promotion de l' assainissement, 15 mars 1994, Version préliminaire]

Operation and Maintenance Working Group. Meeting (1994: Geneva, Switzerland) ,  World Health Organization. Division of Operational Support in Environmental Health ,  [Proceedings of the Operation and Maintenance Working Group Meeting, Geneva, 31 May - 3 June 1994]

Water Supply and Sanitation Collaborative Council Working Group on Promotion of Sanitation ,  Simpson-Hébert, Mayling ,  Wood, Sara ,  World Health Organization. Division of Operational Support in Environmental Health ,  [La promotion de l' assainissement / Groupe de travail sur la promotion de l' assainissement du Conseil de concertation pour l' approvisionnement en eau et l' assainissement; édité par Mayling Simpson-Hérbert et Sara Wood]

Water Supply and Sanitation Collaborative Council. Working Group on Promotion of Sanitation. Meeting (1st: 1994: Thun, Switzerland) ,  World Health Organization. Division of Operational Support in Environmental Health ,  [The problem of sanitation / Water Supply and Sanitation Collaborative Council Working Group on Promotion of Sanitation, 15 March 1994, Draft ed]

Water Supply and Sanitation Collaborative Council. Working Group on Promotion of Sanitation. Meeting (1st: 1994: Thun, Switzerland) ,  World Health Organization. Division of Operational Support in Environmental Health ,  [Versión preliminar] ,  El Problema del saneamiento : Consejo de Colaboración sobre Abastecimiento de Agua y Saneamiento / Grupo de Trabajo sobre Promoción del Saneamiento, 15 de marzo de 1994

Water Supply and Sanitation Collaborative Council. Working Group on Promotion of Sanitation. Meeting (1st: 1994: Thun, Switzerland) ,  World Health Organization. Division of Operational Support in Environmental Health ,  [Le Problème de l' assainissement : conseil de concertation pour l' approvisionnement en eau et l' assainissment / Groupe de travail sur la promotion de l' assainissement, 15 mars 1994, Version préliminaire]

Water Supply and Sanitation Collaborative Council Working Group on Promotion of Sanitation ,  Simpson-Hébert, Mayling ,  Wood, Sara ,  World Health Organization. Division of Operational Support in Environmental Health ,  [La promotion de l' assainissement / Groupe de travail sur la promotion de l' assainissement du Conseil de concertation pour l' approvisionnement en eau et l' assainissement; édité par Mayling Simpson-Hérbert et Sara Wood]