000 00341nam a2200157Ia 4500
008 190201s9999 xx 000 0 und d
020 _a8769247810
082 _a621
082 _b3692 G
100 _a"Gowar,John"
245 0 _aOptical Communication Sy
260 _aNew Delhi
260 _bPHI
260 _c1989
300 _a"xiv,577"
999 _c30766
_d30766