TY  - BOOK
AU  - Lewis, Harry R  & Papadimitriou, Christos H
TI  - Elements of the theory of computation
SN  - 81-203-1016-0
U1  - 001.64 Lew/Pap 
PY  - 1996///
CY  - Prentice-Hall of India, New Delhi
ER  -