A LOOK THROUGH THE WINDOWS.
D000397:Air Pollution; D004782:Environmental Health; D005511:Food Handling; D006801:Humans; D008892:Milk; D011634:Public Health; D012037:Refuse Disposal; D012498:Sanitary Engineering; D014586:USSR; D014876:Water Pollution; D014881:Water Supply
AIR POLLUTION; ENVIRONMENTAL HEALTH; FOOD HANDLING; MILK; PUBLIC HEALTH; REFUSE DISPOSAL; SANITARY ENGINEERING; USSR; WATER POLLUTION; WATER SUPPLY