TY  - BOOK
AU  - Jeffrey D. Ullman
AU  - John E. Hopcroft
TI  - Introduction to automata theory, languages,a nd computation
SN  - 81-85015-96-1
U1  -  005.131 
PY  - 1989///
CY  - New Delhi,India
PB  - Narosa Publishing House
ER  -