Conference for the adoption of a protocol on psychotropic substances   Official records.    

 - New York  United Nations          1973 
 - iii,137p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,93:3(Y:414).N73, L3.1/UN