000 00361nam a22001577a 4500
999 _c3788
_d3788
003 OSt
005 20181025123631.0
008 181025b xxu||||| |||| 00| 0 eng d
082 _a372.3
_bRAO
100 _aRao, V K
245 _aEducational technology
_cV K Rao
260 _aNew Delhi
_bAPH
_c2014
300 _a407p.
650 _aEducation
942 _2ddc
_cBK