Columbia subject headings:
Harvard subject headings:
Authors, Mexican--20th century--Correspondence
Pérez Martínez, Héctor--Correspondence.
Reyes, Alfonso, 1889-1959--Correspondence.
Princeton subject headings:
Authors, Mexican--Correspondence.
Pérez Martínez, Héctor--Correspondence.
Reyes, Alfonso, 1889-1959--Correspondence.