@book{2304,
	author = {Kägi, Paul and Kägi, Werner,},
	title = {La Génesis del materialismo histórico :},
	publisher = {Península,},
	year = {1974},
	series = {Historia, ciencia, sociedad ;},
	address = {Barcelona :},
	note = {Tít. orig.: Genesis des historischen Materialismus: Karl Marx und die Dynamik der Gesellschaft}
}