Nepal 313 Knowledge 85 World Health Organization 78 prevention & control 62 Kathmandu 57 Public Health 55 standards 53 methods 52 Series 49 Environmental health 48 Health aspects 47 Research 44 Environmental aspects 42 Children 39 Pollution 39 Water quality 39 Water Microbiology 38 Water Supply 38 Prevalence 37 Prevention 37 Gezondheid 36 Quality Control 36 Water 36 Water Pollution 36 Water quality management 36 Epidemiology 33 Guidelines 30 Public health 30 Women 27 Environmental exposure 26