Columbia subject headings:
Hazardous substances--Periodicals.
Poisons--Periodicals.
Pollutants--Periodicals.
Harvard subject headings:
Hazardous substances--Periodicals.
Poisons--Periodicals.
Pollutants--Periodicals.
Princeton subject headings:
Hazardous substances--Periodicals.
Periodicals.
Poisons--Periodicals.
Pollutants--Periodicals.