Scientific and technical communicaction :   a pressing national problem and recommendations for its solution 

 - Washington :   National Academy of Sciences,   1969. 
 - xiii, 322 p. :   tablas ;   23 cm. 
 - National academy of sciencies ;   1707 .
<br/><br/> Bibliografía, p.285-306    Apéndices, p.307-317 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INFORMACION, TEORIA DE LA
<br/><br/><label>Universal Decimal Class. No.: </label>007