Columbia subject headings:
Ortega y Gasset, José, 1883-1955.
Paradox--History--20th century.
Harvard subject headings:
Ortega y Gasset, José, 1883-1955.
Paradox--History--20th century.
Princeton subject headings:
Ortega y Gasset, José, 1883-1955.
Paradox--History--20th century.