Columbia subject headings:
Diego, Gerardo, 1896-1987--Friends and associates.
Hierro, José, 1922-2002--Friends and associates.
Harvard subject headings:
Diego, Gerardo, 1896-1987--Criticism and interpretation.
Hierro, José, 1922-2002--Criticism and interpretation.
Spanish literature--20th century
Spanish literature--20th century--History and criticism
Princeton subject headings: