000 00321nam a22001337a 4500
005 20210719152207.0
008 210719b ||||| |||| 00| 0 eng d
041 _aeng
100 _aISTE code 25
_924722
245 _aFibre optics and optical communications
260 _aDelhi
_bMHRD
_c1991
300 _a98
942 _cBK
999 _c62249
_d62249