Salomaa, Arto <br/><br/>
Formal languages 

 - New York :  Academic Press,  1973 
 - 322 p. :  ill. 
 - ACM monograph series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Formal languages
<br/><br/><label>LC Class. No.: </label>QA267.3  / S24