Columbia subject headings:
Germany--History--20th century.
Gilbert, Felix, 1905-1991.
Historians--Germany--Biography.
Harvard subject headings:
Germany--History--20th century.
Gilbert, Felix, 1905-1991.
Historians--Germany--Biography
Princeton subject headings:
Germany--History--20th century.
Gilbert, Felix, 1905-1991.
Historians--Germany--Biography.