00658cam a2200229Ia 4500 20230110144842.0 090720r19881988nyum b a00110 eng d 88-042815 0306429748 TK5105.5 .F74 1988 Freer, John R. Computer communications and networks / John R. Freer. New York : Plenum, c1988. x, 432 p. : ill. ; 26 cm. First published: London : Pitman, 1988. Includes index. Bibliography: p. 416. Computer networks. Data transmission systems. lcc 46447 46447 0 0 lcc 0 0 EMN EMN 2023-01-10 0 0258979 2023-01-10 00:00:00 1 2023-01-10 BK VIRTUAITEM