Gratian,  <br/><br/>
The Treatise on Laws / 

 - Washington :  Catholic University of America Press;  1993. 
 - 131 p. ; 
 - Studies in Medieval and Early Modern Canon Law ;  2 .
<br/><br/> includes index and biblioraphy 
<br/><br/><label>ISBN: </label>081320786X (PB)    
<br/><br/><label>Dewey Class. No.: </label>G21.2  / G772