@book{24888,
	author = {Strayer, Joseph R  and Munro, Dana Carleton },
	title = {The middle ages (395-1500)},
	publisher = {D. Appleton-Century Co., },
	year = {c1942},
	address = {New York : },
	edition = {1 ed.},
	note = {La edad media, 395-1500}
}