000 00281nam a22001097a 4500
082 _a004.6
_bBLD
100 _aUYLESS BLACK
_990423
245 _aDATA NETWORKS concepts,theroy,and practice
_cBLACK UYLESS
260 _anew jersy
_bprentice hall
_c1997
546 _aeng
942 _cBK
999 _c146427
_d146427