Report 

 - New York  United Nations          1977 
 - vii, 176p  cm. 
<br/><br/> Supplement no. 23 (A/31/23/Rev.1) 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,933:8.N76, L6,23.1 /UN