Columbia subject headings:
Harvard subject headings:
Automobile industry and trade--Germany--History--20th century.
Automobile industry and trade--Military aspects--Germany--History--20th century.
Volkswagenwerk--History--20th century.
Princeton subject headings:
Automobile industry and trade--Germany--History--20th century.
Automobile industry and trade--Military aspects--Germany--History--20th century.
Volkswagenwerk--History--20th century.