Salomaa, Arto <br/><br/>
Formal languages / 
by Arto Salomaa 
 - New York :  Academic Press,  1973 
 - xiii,322p.  ill.,  24 cm. 
 - A.C.M. : Monograph series .
<br/><br/>Bibl.: p.315-317. - Index 
<br/><br/><label>ISBN: </label>0126157502 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Formal languages