Columbia subject headings:
Petroleum industry and trade--United States.
Petroleum law and legislation--United States.
Petroleum products--Prices--United States.
Price regulation--United States.
Harvard subject headings:
Petroleum industry and trade--United States
Petroleum law and legislation--United States.
Petroleum products--Prices--United States
Price regulation--United States.
Princeton subject headings:
Petroleum industry and trade--United States.
Petroleum law and legislation--United States.
Petroleum products--Prices--United States.
Price regulation--United States.