00451nam a2200157 a 4500 3804 3804 8120310802 (paperback) 9788120310803 (paperback) 004.6HEL Held, G. Understanding data communications / New Delhi Sams Publishing, 1996. xvii,430p. Data Communications http://www.amazon.com/exec/obidos/ASIN/8120310802/chopaconline-20 BK 0 0 0 0 QUESTCL REF 2014-05-21 0 004.6HEL 23765 2014-05-21 00:00:00 BK 0 0 0 0 REF REF REF 2014-05-21 0 004.6HEL (Shelf - 04C) 23766 2014-05-21 00:00:00 BK 0 0 0 0 REF REF REF 2014-05-21 0 004.6HEL (Shelf - 04C) 23767 2014-05-21 00:00:00 BK 0 0 0 0 QUESTCL QUESTCL 2014-06-17 0 004.6HEL 25765 2014-06-17 00:00:00 2014-06-17 BK