TY  - BOOK
AU  - Tocci,Ronald J.
AU  - Widmer,Neal S.
TI  - Digital systems: principles and applications 
SN  - 8120323149
U1  - 623.815 
PY  - 2001///.
CY  - New delhi : 
PB  - Prentice Hall, 
KW  - Digital electronics
ER  -