Hart, HLA <br/><br/>
The concept of law 

 - 2nd ed. 
 - Oxford  Clarendon  1997 
 - xii,315 p. 
<br/><br/><label>ISBN: </label>0198761236 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Law
<br/><br/><label>Dewey Class. No.: </label>340  / H16