TY  - BOOK
AU  - Williams, Brian K.
AU  - Sawyer, Stacey C.
TI  - Using Information Technology: A Practical Introduction to Computers & Communications 
SN  - 9781259255663
U1  - 004  
PY  - 2015///
CY  - New York
PB  - McGrawHill Education.
KW  - Telecommunication Systems
N1  - Includes Bibliographical References and Index
ER  -