Hennie, Fred. <br/><br/>
Introduction to computability   
by Fred Hennie 
 - Massachusetts  Addison-Wesly  1977 
 - ix, 374p. 
 - A-Wesley Series in Computer science & Information processing .
<br/><br/><label>ISBN: </label>0201028484 
<br/><br/><label>Dewey Class. No.: </label>519.4  / N779;4