HART, H. L. A. <br/><br/>
The concept of law 

 - Oxford  Oxford University Press  1961 
 - 263.: ill. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0194423174 
<br/><br/><label>LC Class. No.: </label>K 237  / har1961