Columbia subject headings:
Butyl methyl ether--Law and legislation--United States.
Gasoline--Law and legislation--United States.
Motor fuels--Environmental aspects--United States.
Reformulated gasoline--Law and legislation--United States.
Harvard subject headings:
Butyl methyl ether--Law and legislation--United States.
Gasoline--Law and legislation--United States.
Motor fuels--Environmental aspects--United States.
Reformulated gasoline--Law and legislation--United States.
Princeton subject headings: