@book{207707,
	author = {Martín Ramos, Jesús},
	title = {Las comunicaciones en la isla de Puerto Rico, 1850-1898},
	publisher = {Academia Puertorriqueña de la Historia},
	year = {[2005]},
	address = {San Juan, P.R.},
	note = {Based on the author's thesis (Ph.D.--Universidad Complutense de Madrid)}
}