Columbia subject headings:
Organization of Petroleum Exporting Countries.
Petroleum as fuel--Prices--Northeastern States.
Petroleum products--Prices--Northeastern States.
Harvard subject headings:
Energy policy--United States
Organization of Petroleum Exporting Countries.
Petroleum as fuel--Prices--Northeastern States.
Petroleum industry and trade
Petroleum products--Prices--Northeastern States.
Princeton subject headings:
Organization of Petroleum Exporting Countries.
Petroleum as fuel--Prices--Northeastern States.
Petroleum products--Prices--Northeastern States.