000 00264nam a2200121Ia 4500
100 _aRao, V. K.
020 _a81 7648 488 1
942 _cBK
654 _a
245 _aEducation System
260 _aNew Delhi
_bAPH Publishing Corporation
_c2004
082 _a371
999 _c390505
_d390505
041 _aeng