Columbia subject headings:
Coal mine waste--United States.
Factory and trade waste--United States.
Mineral industries--Waste disposal--United States.
Petroleum waste--United States.
Recycling (Waste, etc.)--United States.
Refuse and refuse disposal--United States.
Harvard subject headings:
Coal mine waste--United States.
Factory and trade waste--Environmental aspects--United States.
Hazardous wastes--United States
Petroleum waste--United States.
Recycling (Waste, etc.)--United States.
Princeton subject headings: