Gill R R Rockingham <br/><br/>
Deducibility and decidability. 
Gill R R Rockingham 
 - London  Routledge         1990 
 - vii,162p.  cm. 
<br/><br/><label>Standard No.: </label>43757 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R12, N0