Columbia subject headings:
Industrial relations--United States--Congresses.
Middle managers--United States--Congresses.
Truck drivers--United States--Congresses.
Trucking--United States--Congresses.
Harvard subject headings:
Princeton subject headings:
Industrial relations--United States--Congresses.
Middle managers--United States--Congresses.
Truck drivers--United States--Congresses.
Trucking--United States--Congresses.