Nepal 215 World Health Organization 71 Knowledge 60 Kathmandu 38 methods 34 Public Health 33 Public health 26 prevention & control 26 standards 26 Environmental health 24 Prevalence 24 Water quality 23 Environmental aspects 22 Health aspects 22 Gezondheid 20 Pollution 20 Quality Control 20 Research 20 Water 20 Water Microbiology 20 Water Pollution 20 Water Supply 20 Water quality management 20 Health Research 19 Epidemiology 18 Journal of NHRC 18 Journal of Nepal Health Research Council 18 Children 17 Depression 15 Guidelines 15