000 00291 a2200121 4500
080 _a519.92
_bS 173 F
245 1 _aFormal languages
_cby A. Salomaa
260 _aNew York
_bAcademic Press
_c1973
650 _aFormal Languages
100 1 _aSalomaa, A.
_d
300 _a322 p.
901 _a125467
999 _c66403
_d66403