TY  - BOOK
AU  - Gary B. Shelly,
TI  - Business data communications: introductory concepts and techniques 
T2  - Sherly Cashman Series
SN  - 9780789568069 (paperback)
AV  - HD30.335  S54
PY  - 2004///
PY  - 2004///
CY  - Thomsom Course Technology
PB  - Boston
KW  - Data transmission systems
N1  - Includes bibliographical references and index
ER  -