Research development 

 - Barrington, IL :  Technical Pub. Co.,  1960-1978 
 - v. 
<br/><br/><label>ISSN: </label>0034-5199 
 = RD, research development 
 = RD, res. dev. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INVESTIGACION Y DESARROLLO<br/>INVESTIGACION TECNOLOGICA