00498nam a2200133Ia 4500008004100000040001700041082002400058110006700082245006800149260002400217300001000241440007400251650003900325190328s9999||||xx |||||||||||||| ||und|| aNITILcNITIL 221sta371.335bU58V aUnited Nations Education, Scientific and Cultural Organisation 0aVisual aids in fundamental educationbsome personal experiences aParisbUNESCOc1952 a168p. aPress, film and radio in the world today: series of studies/by UNESCO aVisual aids; Fundamental education