TY  - BOOK
AU  - Tooley,Rod
AU  - Bailey,Roger
TI  - Communication technology : today and tomorrow: student workbook 
SN  - 0028387600
PY  - 1997///
CY  - New York, N.Y.
PB  - Glencoe/McGraw-Hill
KW  - Communication
N1  - Includes index; Contents : Introduction to communication technology--Data communication systems
ER  -