The social science activities of some eastern european academies of sciences. 

 - Paris :  UNESCO,  1963. 
 - 61 p. 
 - Reports and papers in the social sciences ;  18. .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>OC 061.6: 3.001.5 (4)=20 1963SOC No.18.