000			00336nam a2200133Ia 4500
001			80718
008			170722s9999 xx 000 0 und d
110			_aUnesco
245			_aEconomics of new educaztional media /
260			_bUNESCO , _c1977.
300			_a200 p. _c22cms
490			_aEducational methods and techniques
942			_cGEN
999			_c93227 _d93227