Polycyclic hydrocarbons in rural and urban air.
D000397:Air Pollution; D006801:Humans; D006838:Hydrocarbons / Q000032:analysis*; D011083:Polycyclic Compounds; D012424:Rural Population
D006838:Hydrocarbons; D011083:Polycyclic Compounds
AIR POLLUTION; HYDROCARBONS/determination