Contraeditorial 

 - Buenos Aires :  Periomundo 
 - v. 
 - Mensual 
<br/><br/> ISSN 
<br/><br/><label>ISSN: </label>1851-3573 
<br/><br/><label>Standard No.: </label>RELAP04045 
<br/><br/><label>Universal Decimal Class. No.: </label>32:172