TY  - BOOK
AU  - Tokheim, Roger L. 
TI  - Digital electronics: principles and applications 
SN  - 9780070587908
AV  - ACC. 18090-18091 
U1  - 621.381 22
PY  - 2003///
CY  - New Delhi, 
PB  - Tata McGraw Hill, 
ER  -