000 00220 a2200097 4500
001 27204
100 _aKennedy, G
245 _aElectronic communications systems
260 _a
_bMcGraw-Hill
_c1977
090 _c18123
_d18123
942 _aNUST-CAE
_cM
_c9029
999 _c262277
_d262277