Columbia subject headings:
Federal aid to transportation--United States.
Motor fuels--Taxation--United States.
Roads--United States--Finance.
Transportation and state--United States.
Transportation, Automotive--Taxation--United States.
Harvard subject headings:
Federal aid to transportation--United States.
Motor fuels--Taxation--United States.
Roads--United States--Finance.
Transportation and state--United States.
Transportation, Automotive--Taxation--United States.
Princeton subject headings:
Federal aid to transportation--United States.
Motor fuels--Taxation--United States.
Roads--United States--Finance.
Transportation and state--United States.
Transportation, Automotive--Taxation--United States.