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Agradecimientos: Se agradece la amabilidad de las siguientes bibliotecas por permitir el uso de sus facilidades en la confección de este trabajo.
- “Library of Congress” (“Biblioteca del Congreso”) - Washington D.C., USA.
- Biblioteca pública “Miami-Dade Public Library” - Miami-Dade, Florida, USA.
- Biblioteca “Otto Richter Library” - University of Miami, Coral Gables, Florida, USA.
- Biblioteca “Steven and Dorothea Green Library” - Florida International University, Miami, Florida, USA.