000 003140000a22001330004500
245 _aData communications & teleprocessing systems
100 _aHousley, T.
250 _a2d ed.
260 _aNew Jersey
_bPrentice Hall
_c1987
020 _a0131974351
080 _a004.7
_bH6
041 _aEN
942 _cBK
999 _c120528
_d120528