Manual for surveying national scientific and technological potential :  Collection and processing of data management of the <<R&D>> system 

 - París :  UNESCO,  1970. 
 - 251 p. :  il. 
 - Science policy studies and documents ;  15. .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>OC 5.001.1 (02)=20 MAN No. 15