@book{447,
	author = {Zulliger, Hans},
	title = {Introducción a la psicología del niño.},
	publisher = {Editorial Herder},
	year = {1971.},
	series = {Biblioteca de psicologia},
	address = {Barcelona},
	note = {Translation of : Einfuhrung die Kinderseelenkunde.}
}