Zweigert, K. <br/><br/>
Sources of international law reform. 
 Sources of international uniform law 

 - Leiden :  A.W. Sijthoff,  1977. 
<br/><br/> In English, French and German. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>International law -- Uniform law.--International law -- Uniform law.<br/>Civil law -- Uniform law.--Civil law -- Uniform law.<br/>Commercial law -- Uniform law.--Commercial law -- Uniform law.<br/>Uniform law.