Columbia subject headings:
Metaphysics.
Personalism--History.
Values.
Xirau, Joaquím, 1895-1946.
Harvard subject headings:
Metaphysics
Personalism--History.
Values.
Xirau, Joaquím, 1895---Metaphysics.
Princeton subject headings:
Metaphysics.
Personalism--History.
Values.
Xirau, Joaquím, 1895-1946.