Columbia subject headings:
Freyer, Hans, 1887-1969.
Sociology--Germany--History.
Sociology--Study and teaching--Germany--History.
Harvard subject headings:
Freyer, Hans, 1887-1969.
Sociology--Germany--History
Sociology--Germany--History--20th century
Sociology--Study and teaching--Germany--History--20th century.
Sociology--Study and teaching--Germany--History.
Princeton subject headings:
Freyer, Hans, 1887-1969.
Sociology--Germany--History--20th century.
Sociology--Study and teaching--Germany--History--20th century.