Sources of international uniform law / 
edited by Konrad Zweigert and Jan Kropholler 
 - Leiden :  Sijthoff,  1973 
 - 71 p. ;  25 cm. 
<br/><br/><label>ISBN: </label>9028601635 (pbk) :  PND 15.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Law--International unification--Sources
<br/><br/><label>Dewey Class. No.: </label>341.09