@book{34926,
	author = {Merciai, S. A. and Contini, G.},
	title = {Hacia una psicopedagogia de libre expresion /},
	publisher = {Eds. Roca },
	year = {1978.},
	series = {Roca pedagogia ;},
	address = {Mexico },
	note = {No. 4.}
}