@book{65306,
	author = {Freinet, Célestin. and Riera, Ignasi (},
	title = {L'ensenyament de les ciènces / },
	publisher = {Laia, },
	year = {[1973]},
	series = {Biblioteca de l'escola moderna ; },
	address = {Barcelona : },
	edition = {[1ª ed.].}
}