000 00321nam a2200133Ia 4500
008 190829s9999||||xx |||||||||||||| ||und||
100 _aSethi, N.K
245 0 _aText-Book of Books of Optics
250 _a3RD ED.
260 _bPremier Publishing
_aDelhi
_c1957
650 _aOptics
700 _aRaizada, S.B
942 _cBK
999 _c6950
_d6950