000 00257nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
082 _a535 S243
100 _aSARBHAI.K.P
245 0 _aOPTICS
260 _aDELHI
_bS. Chand Publishing
_c1973
942 _cBK
_2DDC
999 _c46863
_d46863