Columbia subject headings:
Harvard subject headings:
Drais, Karl Friedrich Christian Ludwig, Freiherr von Sauerbronn, 1785-1851
Motor vehicles--Germany (West)--History.
Princeton subject headings:
Drais, Karl Friedrich Christian Ludwig, Freiherr von Sauerbronn, 1785-1851.
Industrialists--Germany--Biography.
Inventors--Germany--Biography.
Technological innovations--Germany--History--19th century.