TY  - BOOK
AU  - Singh, A.K
AU  - Tiwari, M
AU  - prakash, A.
TI  - Digital Principles & Switching Theory
SN  - 9788122422412
U1  - 621.3815 SIN/DIG 
PY  - 2008///
CY  - New Delhi
PB  - New Age International 
ER  -