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020 _a1870430607
040 _cPK-IsLIS
082 _a535
_bV341
100 _aVasudeva, D. N.
245 _aA textbook of light
_c/ D. N. Vasudeva
250 _a10th ed.
260 _bAtma Ram and Sons,
_aNew Delhi :
300 _aix, 628 p.
500 _aincludes index
650 _aLight
942 _cBK
505 0 _a1. Geometrical optics 2. Physical optics