00521nam a22001457a 4500 0 0 0 0 RIU RIU 2012-08-07 Purchased: Pak Book Cooperation 1919.00 1 1 621.3981 DUC 0799 2015-02-02 00:00:00 2014-09-05 1 2019-02-21 BK 3561 3561 0201427885 (pbk) 621.3981 DUC Duck, Michael Peter Bishop Richard Read Data communications for engineers England Addison-Wesley 1996 xiii, 270 p. : ill. ; 23 cm. Includes index. Optical communications Local area networks Computer networks Broadband networks Line codes Transmission Modems FEAS BK