Hart H.L.A. Au. <br/><br/>
The concept law 

 - 2nd 
 - London  Oxford university press London       2002 
 - 315p  cm. 
<br/><br/><label>Standard No.: </label>9,390 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>Z, P2