00457nam a2200169Ia 4500008004100000082001700041100002100058245003800079250000600117260005400123300000800177650001400185650002000199653002100219653002700240700002000267170901s1966    xx            000 0 und d  a371.33bD32M  aKieffer, R.E. de 0aManual of Audio-Visual Techniques  a2  aNew DelhibPrentice-Hall of India Pvt. Ltd.c1966  a254  aEducation  aSocial sciences  aAudiovisual aids  aEducational technology  aCochran, Lee W.