000 00345nam a22001457a 4500
005 20210917143221.0
008 210917b ||||| |||| 00| 0 eng d
041 _aeng
100 _aLonghussl R S
_926557
245 _aGeometrical & physical optics
250 _a3rd
260 _aDelhi
_bOrient longman
_c1986
300 _a677
942 _cBK
999 _c186534
_d186534