Raz, Joseph. <br/><br/>
The concept of a legal system :  an introduction to the theory of legal system / 
(by) Joseph Raz. 
 - 2nd edition. 
 - Oxford :  Clarendon Press,  1980. 
<br/><br/> Previous ed.: 1970. 
<br/><br/><label>ISBN: </label>019825363X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Jurisprudence.