Huberman, A. M. Understanding change in education: an introduction / A. M. Huberman. -- - Paris : Ginebra : UNESCO; OIE, 1973. - vi, 99 (1) p.; il. -- - (Experiments and innovations in education; 4) . ISBN: 9231011162 No. de Clasificación Universal Decimal: 37.013 =20 HUB No.4.