Hermes, Hans. <br/><br/>
Enumerability . decidability computability  an introduction to the theory of recursive functions 
by Hans Hermes, tr. by G. T. Hermann 
 - 2nd 
 - Berlin  Springer-Verlag  1969 
 - x, 245p. 
 - Die Grundlehren der mathematischen Wissenschaften in Einzeldarstellungen Band  127 .
<br/><br/><label>LCCN: </label>76-89552 
<br/><br/><label>Dewey Class. No.: </label>511.3  / N693;5