TY  - BOOK
AU  - Held,Gilbert
TI  - Understand data communications
SN  - 0672322161
PY  - 2002///
CY  - Boston
PB  - Addison-Wesley
KW  - Data transmission systems
KW  - Computer networks
N1  - Includes glossary and index; Includes bibliographical references (p. 706-708)
ER  -