TY  - GEN
AU  - Tokheim, Roger L.
TI  - Theory and problems of digital principles/ 3rd ed
SN  - 0-07-058955-0
U1  - 621.382 
PY  - 2004///
CY  - New Dehi
PB  - Tata McGraw hill
KW  - 621.382
ER  -