Columbia subject headings:
Hazardous wastes--Incineration--United States--Safety measures.
Metal vapors--Health aspects--United States--Evaluation.
Metal wastes--Environmental aspects--United States--Evaluation.
Harvard subject headings:
Hazardous wastes--Incineration--United States--Safety measures.
Metal vapors--Health aspects--United States--Evaluation.
Metal wastes--Environmental aspects--United States--Evaluation.
Princeton subject headings: