TY  - BOOK
AU  - Lewis, Harry, R. Papadimitriou, Chistos 
TI  - Elements of the theory of computation 
SN  - 81-7808-487-2 
U1  - 004 LEW  
PY  - 2001///
CY  - Pearson education of asia 
PB  - Delhi 
KW  - COMPUTER SCIENCE
ER  -