Columbia subject headings:
Hazardous substances--Classification.
Hazardous substances--Health aspects.
Hazardous substances--Labeling.
Harvard subject headings:
Hazardous substances--Classification.
Hazardous substances--Health aspects.
Hazardous substances--Labeling.
Princeton subject headings:
Hazardous substances--Classification.
Hazardous substances--Health aspects.
Hazardous substances--Labeling.