@book{115718,
	author = {Ubeda y Delgado, Manuel, and Fernández Juncos, Manuel, },
	title = {Isla de Puerto Rico},
	publisher = {Tip. del Boletín},
	year = {1878.},
	address = {San Juan, P.R.},
	note = {Pedreira has title: Estudio histórico, geográfico y estadístico de la isla de Puerto Rico.}
}