International law in comparative perspective / 
edited by William E. Butler. 
 - Alphen aan den Rijn :  Sijthoff & Noordhoff,  1980. 
 - 315 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>9028600892 
<br/><br/><label>Subjects--Topical Terms: </label><br/>International law.