Columbia subject headings:
Harvard subject headings:
Culture--Study and teaching--Congresses
Historiography--Congresses
Spengler, Oswald, 1880-1936--Congresses.
Princeton subject headings:
Culture--Study and teaching--Congresses.
Historiography--Congresses.
Spengler, Oswald, 1880-1936--Congresses.
Spengler, Oswald, 1880-1936--Influence--Congresses.