00378nam a2200121Ia 4500008004100000040001700041082002500058100001600083245004400099260003600143300001000179650006700189190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta371.335bS956V  aSumner, W L 0aVisual methods in educationcW L Sumner  aOxfordbBasil Blackwellc[19-?]  a231p.  aEducatin-Audio-Visual aids; Motion pictures-Study and teaching