Columbia subject headings:
Harvard subject headings:
Civilization, Western--Philosophy--Congresses.
Civilization--History--Congresses.
Culture--Philosophy--Congresses
Europe--Civilization--Congresses.
History--Philosophy--Congresses
Spengler, Oswald, 1880-1936--Congresses.
Spengler, Oswald, 1880-1936. Untergang des Abendlandes--Congresses.
Princeton subject headings:
Civilization, Western--Philosophy--Congresses.
Civilization--History--Congresses.
Culture--Philosophy--Congresses.
Europe--Civilization--Congresses.
History--Philosophy--Congresses.
Spengler, Oswald, 1880-1936--Congresses.
Spengler, Oswald, 1880-1936. Untergang des Abendlandes--Congresses.