Automata,Languages and Programming.Fourth Colloquium, University of Turku,Finland,July 18-22,1977 / 
Ed. Salomaa Arto [i in.]. 
 - Berlin :  Springer,  1977. 
 - X,569s.,bibliogr. ;  24cm. 
<br/><br/> ISSN 130 ; 52. 
<br/><br/><label>ISSN: </label>130 
<br/><br/><label>Universal Decimal Class. No.: </label>681.3.06(061.3)