s.a. XXIV CONFERENCE INTERNATIONALE DE LINSTRUCTION PUBLIQUE. LORGANISATION DE LEDUCATION PRESCOLAIRE. RECHERCHE DEDUCATION COMPAREE. Bureau International deducation. Geneve. 1961 290 p. (24 cm) Rustica. Sello ant. prop. en lomo y cubierta. L (Ref.21109) frances pedagogia educacion niños prescolar