00378cam a2200145 a 450000500170000000800410001703500150005805000170007310000180009024500210010826000380012930000190016744000250018665000210021120260818114329.0110531s1973    us a    r     000|0 eng d  a.b11538545 4aQA267.3bS241 aSalomaa, Arto10aFormal languages  aNew York :bAcademic Press,c1973  a322 p. :bill. 0aACM monograph series 0aFormal languages