NASA technical publications announcements 

 - washington, d.c. :  national aeronautics and space administration (nasa), 
 - Quincenal 
<br/><br/><label>ISSN: </label>0502-2487 
 = NASA technical publications announcements 
 = nasa tech. publ. announce. 
<br/><br/><label>Subjects--Index Terms: </label>VARIOS BIBLIOGRAFIA;  INDICES