000 00277nam a2200121Ia 4500
008 190719s9999 xx 000 0 und d
082 _a535 G411
100 _aGHATAK,A
245 0 _aOPTICS
260 _aNEW DELHI
_bTata McGraw-Hill
_c1978
300 _a23X16
942 _cBK
_2DDC
999 _c46864
_d46864