Columbia subject headings:
Cigarette smoke--Carcinogenicity--Congresses.
Mycotoxins--Carcinogenicity--Congresses.
Nitroso compounds--Carcinogenicity--Congresses.
Tobacco--Carcinogenicity--Congresses.
Harvard subject headings:
Mycotoxins--Carcinogenicity--Congresses
Nitroso compounds--Carcinogenicity--Congresses
Tobacco smoke--Congresses.
Princeton subject headings: