Statistical commission    Report on the 20th session official  (20 feb -2 March 1979).    

 - New York  UN           1979 
 - v,83p. Suppl;3  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,936:8.N79, L9.3/UN