Columbia subject headings:
Díaz Pardo, Horacio, 1881-1940.
Philosophy, Modern.
Sociology, Rural.
Vitier, Medardo, 1886-1960.
Harvard subject headings:
Díaz Pardo, Horacio, 1881-1940.
Philosophy, Modern.
Sociology, Rural.
Vitier, Medardo, 1886-1960.
Princeton subject headings: