@book{99885,
	author = {Bauer, Wilhelm. and Vadeavellano, Luis G., de,},
	title = {Introducción al estudio de la historia },
	publisher = {Bosch Casa Editorial,},
	year = {1970.},
	address = {Barcelona, España :},
	edition = {4a ed.},
	note = {Incluye índice.}
}