Columbia subject headings:
Harvard subject headings:
Philosophers--Germany--20th century--Congresses.
Rosenstock-Huessy, Eugen, 1888-1973--Congresses.
Social sciences--Philosophy--Congresses
Princeton subject headings:
Philosophers--Germany--20th century--Congresses.
Rosenstock-Huessy, Eugen, 1888-1973--Congresses.
Social sciences--Philosophy--Congresses.