TY  - BOOK
AU  - Leon, Alexis Leon, Mathews 
TI  - Fundamentals of computer science and communication engineeri 
SN  - 81-259-0682-7 
U1  - 004 LEO  
PY  - 1998///
CY  - Leon tech world 
PB  - Boston 
KW  - COMPUTER SCIENCE
ER  -