Columbia subject headings:
Authors, Mexican--20th century--Correspondence.
Azuela, Mariano, 1873-1952.
Harvard subject headings:
Authors, Mexican--20th century--Biography
Azuela, Mariano, 1873-1952--Correspondence.
Princeton subject headings:
Authors, Mexican--20th century--Correspondence.
Azuela, Mariano, 1873-1952.