000 00295nam a2200133Ia 4500
008 190201s9999 xx 000 0 und d
020 _a9.78813E+12
100 _a"Black, Uyless"
245 0 _aOptical Networks
260 _aNew Delhi
260 _bPHI
260 _c1987
300 _a"IX, 451"
999 _c19732
_d19732