Hart, H. L. A <br/><br/>
The concept of law / 
H. L. A Hart 
 - 3rd ed. 
 - Oxford :  Oxford University Press,  2012. 
 - ix, 333 p. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780199644704 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Jurisprudence<br/>Law -- Philosophy
<br/><br/><label>LC Class. No.: </label>(KWP2) K237