Columbia subject headings:
Benzene--Health aspects.
Carcinogens--Government policy--United States.
Carcinogens--Safety regulations--United States.
Formaldehyde--Health aspects.
Harvard subject headings:
Benzene--Health aspects.
Carcinogens--Government policy--United States.
Carcinogens--Safety regulations--United States.
Formaldehyde--Health aspects.
Princeton subject headings:
Benzene--Health aspects.
Carcinogens--Government policy--United States.
Carcinogens--Safety regulations--United States.
Formaldehyde--Health aspects.