000 00297nam a2200133Ia 4500
001 12607
008 150525s9999 xx 000 0 und d
020 _a0-07-057157-0
100 _a
245 _aElectronic Communication
250 _a0
260 _aLondon
_bMcgraw-Hill
_c1991
300 _a,;ill.
999 _c47577
_d47577