Columbia subject headings:
Harvard subject headings:
Beverage containers--Recycling--Law and legislation--United States.
Energy conservation--Law and legislation--United States
Recycling (Waste, etc.)--Law and legislation--United States.
Princeton subject headings:
Beverage containers--Recycling--Law and legislation--United States.
Energy conservation--Law and legislation--United States.
Recycling (Waste, etc.)--Law and legislation--United States.