00304nam a2200121Ia 4500008004100000020001800041041000800059082001400067100001300081245005200094260002800146300000800174211209s1999    xx            000 0 und d  a9788131711453  aeng  a004.6 KES  aKESHAV S  aAN ENGINEERING APPROACH TO COMPUTER NETWORKING   bPEARSON EDUCATIONc1999  a642