000 00303nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a621.39
_bELI
100 _aElion, G R
245 0 _aFiber optics in communication systems
260 _aNew York
_bDekker
_c1978
700 _aElion, H H
942 _cBK
999 _c29897
_d29897