Quantitative composition of the urban atmosphere in terms of polynuclear aza heterocyclic compounds and aliphatic and polynuclear aromatic hydrocarbons.
D000397:Air Pollution; D002845:Chromatography; D006571:Heterocyclic Compounds; D006838:Hydrocarbons; D013053:Spectrophotometry; D014481:United States
D006571:Heterocyclic Compounds; D006838:Hydrocarbons