Columbia subject headings:
Harvard subject headings:
Authors, Mexican--20th century--Correspondence
Méndez Plancarte, Alfonso, 1909-1955--Correspondence.
Méndez Plancarte, Gabriel, 1905-1949--Correspondence.
Reyes, Alfonso, 1889-1959--Correspondence.
Princeton subject headings:
Authors, Mexican--20th century--Correspondence.
Reyes, Alfonso, 1889-1959.