TY  - BOOK
AU  - Lucky, R. W.
AU  - Salz, J.
AU  - Weldon, E. J.
TI  - Principles of data communication /by R. W. Lucky, J. Salz and E. J. Weldon
U1  - 621.38 
PY  - 1968///
CY  - New York
PB  - McGraw-Hill
ER  -