@book{65305,
	author = {Freinet, Célestin. and Beaugrand, M.},
	title = {L'ensenyament del calcul / },
	publisher = {Laia, },
	year = {[1973]},
	series = {Biblioteca de l'escola moderna},
	address = {Barcelona : },
	edition = {[1ª ed.].}
}