TY  - BOOK
AU  - Leach. Donald P. 
AU  - Malvino, Albert Paul 
TI  - Digital Principles and Aplications 
SN  - 978-0-07-060175-8 
U1  - 621.38153 
PY  - 2008///
CY  - New Delhi
PB  - Tata Mc Graw Hill Publishing Company 
ER  -