000 00282nam a22001217a 4500
999 _c6174
_d6174
003 OSt
005 20210319110529.0
008 210319b ||||| |||| 00| 0 eng d
100 _aWILLIAM STALLINGS
245 _aDATA AND COMPUTER COMMUNICATIONS
260 _bPEARSON
942 _2ddc
_cGE