000 00323nam a2200133Ia 4500
999 _c25152
_d25152
008 190711s9999 xx 000 0 und d
020 _a0070252343
082 _a621.384 G979
100 _aGurewich, Nathan.
245 0 _aCommunications systems
260 _aNew Delhi
_bMcGraw-Hill
_c1992
300 _a24X16
942 _cBK