Columbia subject headings:
Casebooks (Law)
Energy conservation--Law and legislation--United States--Cases.
Natural resources--Law and legislation--United States--Cases.
Power resources--Law and legislation--United States--Cases.
Harvard subject headings:
Energy conservation--Law and legislation--United States--Cases.
Natural resources--Law and legislation--United States--Cases.
Power resources--Law and legislation--United States--Cases.
Princeton subject headings: