Columbia subject headings:
Automobile industry and trade--United States--History.
Automobiles--History.
Automobiles--Social aspects--United States.
Harvard subject headings:
Automobile industry and trade--United States--History
Automobiles--History
Automobiles--Social aspects--United States
Princeton subject headings:
Automobile industry and trade--United States--History.
Automobiles--History.
Automobiles--Social aspects--United States.