Columbia subject headings:
Rodríguez-Acosta, Miguel, 1902---Correspondence.
Harvard subject headings:
Authors, Spanish--20th century--Correspondence
Pérez de Ayala, Ramón, 1880-1962--Correspondence.
Pérez de Ayala, Ramón, 1880-1962--Friends and associates.
Rodríguez-Acosta, Miguel, 1902-
Princeton subject headings:
Pérez de Ayala, Ramón, 1880-1962--Correspondence.