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References
edit- Aponte, Roger. "Ponce & Guayama Railroad". Railroads of Puerto Rico / Ferrocarriles de Puerto Rico. Retrieved 16 February 2021.
- Aponte, Roger (1984). Apuntes sobre el último ferrocarril de Puerto Rico, Ponce & Guayama Railroad. Ponce: Editorial Kider Printing. (in Spanish)
- Pumarada, Luis (1980). Trasfondo histórico del ferrocarril en Puerto Rico. Mayagüez: Centro de Investigaciones de Ingeniería, Recinto Universitario de Mayagüez. (in Spanish)