CROSSLEY J N and others <br/><br/>
What is mathematical logic? 
CROSSLEY J N and others 
 - London  Oxford University Press          1972 
 - ix, 82p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>B:(R1), L2