000 00277nam a2200121Ia 4500
100 _aChakravarty, S. R.
942 _cBK
654 _a
245 _aAudio-visual aids in education
260 _aNew Delhi
_bSagar Publications
_c1977
082 _a371.33
300 _c22cm
_a8112
999 _c391936
_d391936
041 _aeng