000 00215 a2200097 4500
001 4333
100 _aBaghdedy,E.J
245 _aLectures on communictions systems
260 _a
_bMcgrawhill
_c
090 _c3549
_d3549
942 _aNUST-CAE
_cM
_c28324
999 _c239406
_d239406