Mackie J L <br/><br/>
Problems from Locks 
Mackie J L 
 - Oxford  Clarendon Press        1976 
 - ix,237p.  cm. 
<br/><br/> Bib 227-32p 
<br/><br/><label>Standard No.: </label>66,611 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R3xK32:g, L6-;1