THE PHYSICIAN AND NATIONAL HEALTH.
D000397:Air Pollution; D006801:Humans; D009787:Occupational Medicine; D011051:Poliomyelitis; D011832:Radiation Injuries; D012899:Smallpox; D013742:Tetanus; D014481:United States; D012901:Variola virus; D014876:Water Pollution
AIR POLLUTION; INDUSTRIAL MEDICINE; POLIOMYELITIS; RADIATION INJURY; SMALLPOX; TETANUS; UNITED STATES; WATER POLLUTION