000 00308nam a22001457a 4500
020 _a9788189979874
082 _a621.36
_bGUP/O
100 _aGupta,A.K.
245 _aOptics
260 _aNew Delhi
_bPearl Books
_c2008
300 _a248p.
650 _aOptical fibers
650 _aPhotonics
942 _cBK
999 _c37173
_d37173