D'Amato, Anthony A. <br/><br/>
The concept of custom in international law / 
by Anthony a. D'Amato 
 - Ithaca, N.Y. :  Cornell University Press,  1971 
 - xvi, 286 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>0801406196 
<br/><br/><label>LCCN: </label>76-144030 
<br/><br/><label>Subjects--Topical Terms: </label><br/>International law