(United States Geological Survey, different years, 1940s and 1950s)
Ponce & Guayama RR – Prepared and published by the Defense Mapping Agency, Topographic Center, Washington, D. C., Map information as of 1977, Scale 1:50,000
Plano de vía Ponce & Guayama RR (Sketch Ponce & Guayama Railroad) Compare con los dos mapas anteriores. Los nombres identifican los desvíos. / Compare with the previous maps. Names refer to sidings. (Colección Privada)
http://ferrocarrilesdepuertorico.web.officelive.com/P3railroadPRList_files/pgmilitar-10000.jpg