Notes

Notes
1
George Wharton James, In and Around the Grand Canyon, 233 (Boston, 1913).
2
Don Carlos Nebel, Viaje Pintoresco y Arqueolojico sobre la Parte Mas Interesante de la RepMica Mejicana en los Anos Transcurridos desde 1829 hasta 1834 (Paris y Mexico, 1840).
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