Columbia subject headings:
Harvard subject headings:
Transportation, Automotive--New England--Cost of operation--Statistics--Periodicals.
Trucking--New England--Costs--Statistics--Periodicals.
Trucks--Cost of operation--Statistics--Periodicals.
Princeton subject headings:
Transportation, Automotive--New England--Cost of operation--Statistics--Periodicals.
Transportation, Automotive--New England--Cost of operation.
Trucking--New England--Costs--Statistics--Periodicals.
Trucks--Cost of operation--Statistics--Periodicals.