@book{129042,
	author = {Leif, Joseph. and Delay, Jean Paul Louis},
	title = {Psicología y educación del niño},
	publisher = {Editorial Kapelusz},
	year = {1968.},
	series = {Biblioteca de Cultura pedagogica},
	address = {Buenos Aires},
	note = {Translation of Psychologie et éducation.}
}