National Bureau of Standards circular 

 - Washington :  United States. National Bureau of Standards,  1911- 
 - v. 
<br/><br/><label>ISSN: </label>0096-9648 
 = National Bureau of Standards circular 
 = Natl. Bur. Stand. circ. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NORMALIZACION<br/>NORMAS TECNICAS
<br/><br/><label>Universal Decimal Class. No.: </label>62(083.7)