@book{118152,
	author = {Mitscherlich, Alexander and Mitscherlich, Margarete},
	title = {Fundamentos del comportamiento colectivo},
	publisher = {Alianza Editorial},
	year = {1973.},
	series = {Alianza universidad},
	address = {Madrid},
	note = {Translation of Die Unfähigkeit zu trauern. Grundlagen kollektiven verhaltens.}
}