1. Report of the 2nd global scientific meeting on trachoma;WHO,2003
2. Global data on visual impairment in the year 2002;Resnikoff;Bull World Health Organ,2004
3. Achieving community support for trachoma control: a guide for district work;Francis,1993
4. Water availability and trachoma;West;Bull World Health Organ,1989
5. Water, trachoma and conjunctivitis;Prost;Bull World Health Organ,1989