TY  - BOOK
AU  - Barden,Robert A.
AU  - Hacker,Michael
TI  - Communication technology
SN  - 0827332254
PY  - 1990///
CY  - [Albany, N.Y.] : 
PB  - Delmar Publishers, 
KW  - Telecommunication
N1  - Includes index
UR  - http://www.loc.gov/catdir/enhancements/fy1305/89011927-b.html
ER  -