00370nam a2200109Ia 4500008004100000020001800041082001300059100002100072245011700093260004200210300000800252190710s9999 xx 000 0 und d a81-86030-55-7 a372 R85J aRuhela, S P, Ed. 0aJoyful learning : its foundations and implementation, in the context of universalization of elementary education aNew DelhibRegency Publicationsc1997 a256