00590nam a2200241Ia 4500008004100000041001200041082000800053082001100061100001900072100001800091100001100109245005000120250001200170260001400182260003000196260000900226300001500235365002500250650002700275650002000302650001300322650001300335150909s9999    xx            000 0 und d  aEnglish  a370  bWIT/IN  aSchuller C F    aWittich W A    eAuthor  aInstructional technology : its nature and use  a6th Ed.  a New York  bHarper and Raw Publishers  c1979  a331  Pages  aRs .165 .50           aAudio visual education  acommunity study  aleaching  alearning