000 00261nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
082 _a535 S495
100 _aSETHI,N.K
245 0 _aTEXT BOOK OF OPTICS
260 _bS. Chand Publishing
_c1965
942 _cBK
_2DDC
999 _c47565
_d47565