Columbia subject headings:
Harvard subject headings:
Automobiles--Design and construction--Congresses
Automobiles--Technological innovations--Europe--History--19th century--Congresses.
Automobiles--Technological innovations--Europe--History--20th century--Congresses.
Princeton subject headings:
Automobiles--Design and construction--Congresses.
Automobiles--Technological innovations--Europe--History--19th century--Congresses.
Automobiles--Technological innovations--Europe--History--20th century--Congresses.