000 00313nam a22001337a 4500
999 _c4310
_d4310
008 170710b xxu||||| |||| 00| 0 eng d
020 _a8176487031
082 _a371.33
100 _aRao, V.K.
245 _aInstructional technology
260 _aNew Delhi
_bAPH Pub.
_c2005
300 _a276p. :
942 _2ddc
_cBK