000 00279nam a2200121Ia 4500
008 230321s9999 xx 000 0 und d
082 _a370
_bBHA
100 _aBhatnagar, R.P
245 0 _aEducational Technology & Management
260 _bLoyal
_c2004
300 _a410
942 _cBK
999 _c448
_d448