@book{21826,
	author = {Pérez Galdós, Benito, and Pérez Galdós, Benito,},
	title = {Gerona ;},
	publisher = {Porrúa },
	year = {1985.},
	series = {Sepan cuantos;},
	address = {México },
	edition = {3a ed.}
}