000 00341nam a2200133Ia 4500
008 190829s9999 xx 000 0 und d
082 _a020
_bOHD/L
100 _aOHDEDAR A.K.
100 _aSEN GUPTA, B.
245 0 _aLIBRARY CLASSIFICATION
250 _a2nd Ed.
260 _bWorld Press Pvt. Ltd., Calcutta
_aCalcutta
_c1977
942 _cBK
999 _c11524
_d11524