Salomaa, Arto <br/><br/>
Jewels of formal language theory/ 
Arto Salomaa. 
 - London:  Pitman,  1981. 
 - ix, 144 p.:  ill.;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 139-142. 
<br/><br/><label>ISBN: </label>0273085220 (UK) 0914894692 (US) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Formal languages.
<br/><br/><label>Dewey Class. No.: </label>511.3  / S173j