TY  - BOOK
AU  - Hopcroft John E
AU  -  Ullman Jeffrey D
TI  - Introduction to automata theory, languages and computation
U1  - D65,8, L9 
PY  - 1979///
CY  - Menlopark
PB  - Addison-Wesley         
KW  -  Formal languages
KW  - Machine theory
ER  -