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