@book{84140,
	author = {Liedman, Sven-Eric, and Madariaga, Juanmari,},
	title = {Karl Marx :},
	publisher = {Akal,},
	year = {[2020]},
	series = {Akal Biografías ;},
	address = {Tres Cantos, Madrid, España :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/70719/}
}