Columbia subject headings:
Petroleum as fuel--Research--United States.
Petroleum law and legislation--United States.
Petroleum products--Prices--Law and legislation--United States.
Harvard subject headings:
Oil burners--Research--United States.
Petroleum as fuel--Research--United States.
Petroleum law and legislation--United States.
Petroleum products--Prices--Law and legislation--United States.
Power resources--Research--Law and legislation--United States.
Princeton subject headings: