Columbia subject headings:
Aromatic compounds--Toxicology--Congresses.
Carcinogens--Congresses.
Environmentally induced diseases--Congresses.
Hydrocarbons--Analysis--Congresses.
Hydrocarbons--Toxicology--Congresses.
Polycyclic compounds--Toxicology--Congresses.
Harvard subject headings:
Aromatic compounds--Toxicology--Congresses.
Carcinogens--Congresses
Environmentally induced diseases--Congresses
Hydrocarbons--Analysis--Congresses.
Hydrocarbons--Toxicology--Congresses.
Polycyclic compounds--Toxicology--Congresses.
Princeton subject headings: