TY  - BOOK
T1  - Studies in abstract families of languages
T2  - Memoirs of the American mathematical Society
A1  - Ginsburg, Seymour 1927-
A2  - Greibach, Sheila 1939-
A2  - Hopcroft, John E. 1939-
LA  - English
PP  - Providence, Rhode Island
PB  - American Mathematical Society
YR  - 1969
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217607772443
OP  - 51
CN  - QA1 A53 No.87 1969
KW  - Machine theory.
KW  - Computer programming.
ER  -