00425nam a22001457a 4500008004100000020001700041040005500058080001800113100001500131245003800146260004600184300001400230650001200244653002300256230328b        |||||||| |||| 00| 0 eng d  a07668-1388-6  aNational Science LibrarycNational Science Library  aD 681.324bP11 aElahi, Ata  aNetwork communications technology  aAfrica: bDelmar Thomson Learning, c2001  axv, 351p.  aNetwork  aData communication