Columbia subject headings:
Harvard subject headings:
Catastrophical, The.
Regression (Civilization)
Social change
Social prediction.
Sociology--Philosophy
Spengler, Oswald, 1880-1936.
Princeton subject headings:
Catastrophical, The.
Regression (Civilization)
Social change.
Social prediction.
Sociology--Philosophy.
Spengler, Oswald, 1880-1936.