ULRICH'S international periodicals directory : a classified guide to current periodicals foreign and domestic. 

 - 6 
 - New York :  R. R. Bowker,  1975 
 - v. 
<br/><br/> Monografía 
<br/><br/><label>Subjects--Index Terms: </label>Publicaciones Periódicas - Directorios 
<br/><br/><label>LC Class. No.: </label>Z6941/U56