ELIMINATION OF FROST-PROOF TOILETS AND HYDRANTS.
D003140:Communicable Disease Control; D006306:Health Surveys; D006801:Humans; D011634:Public Health; D014038:Toilet Facilities; D014876:Water Pollution; D014881:Water Supply
COMMUNICABLE DISEASE CONTROL; HEALTH SURVEYS; LATRINES; PUBLIC HEALTH; WATER POLLUTION; WATER SUPPLY