Columbia subject headings:
Asia--Study and teaching--Germany--History--20th century.
Asianists--Germany--Biography.
Oriental philology--Study and teaching.
Ritter, Hellmut, 1892-1971.
Harvard subject headings:
Asianists--Germany--Oberursel--Biography.
Ritter, Hellmut, 1892-1971.
Princeton subject headings:
Asia--Study and teaching--Germany--History--20th century.
Asianists--Germany--Biography.
Oriental philology--Study and teaching.
Ritter, Hellmut, 1892-1971.