000 00255nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aRao, V K
245 0 _aInstructional Technology
260 _aNew Delhi
_bA.P.H.
_c2013
300 _a276p.
942 _cBK
999 _c15664
_d15664