Columbia subject headings:
Guzmán, Martín Luis, 1887-1976--Criticism and interpretation.
Guzmán, Martín Luis, 1887-1976. Águila y la serpiente.
Harvard subject headings:
Guzmán, Martín Luis, 1887-1976--Criticism and interpretation.
Guzmán, Martín Luis, 1887-1976. Águila y la serpiente.
Princeton subject headings:
Guzmán, Martín Luis, 1887-1976--Criticism and interpretation.
Guzmán, Martín Luis, 1887-1976. Águila y la serpiente.