00979cam a22003378a 4500 719485 BD-DhUL 20150118115816.0 890313s1989 nyua b 001 0 eng 88032596 0-07-607700-26 (OCoLC)223336944 (OCoLC)ocn223336944 (CStRLIN)NYCG89-B18421 (NNC)719485 CPaHP NNC BD-DhUL BD-DhUL TK5105 .H425 1989 384.3 19 HED TK5105 .H425 1989 Held, Gilbert, 1943- Data communications : a comprehensive approach / Gilbert Held, Ray Sarch. 2nd ed. New York, N.Y. : McGraw-Hill Information Service, c1989. 8901 xix, 539 p. : ill. ; 24 cm. Includes bibliography and index. Data transmission systems. Sarch, Ray. AUTH ddc BK 32662 32662 0 0 ddc 0 384_300000000000000_HED 0 NFIC 61369 DUSL DUSL GEN 1990-03-04 Purchased 0.00 384.3 HED 314491 2015-01-18 2015-01-18 BK