000 00248nam a2200109Ia 4500
008 211126s9999 xx 000 0 und d
082 _a621.36
100 _aSUBRAHMANYAM BRIJLAL
245 2 _aA T.B. F OPTICS
260 _bS CHAND
942 _cBTECH
999 _c163791
_d163791