Letra internacional. 
 Letra  <1990-1991-> 

 - Spanish ed. 
 - Madrid :  Editorial Pablo Iglesias,  [1986- 
 - v. :  ill. ;  37 cm. 
 - Quarterly 
 - 1 (enero/marzo 86)- 
<br/><br/> Latest issue consulted: 20 (invierno 1990/1991).  Title from cover. 
<br/><br/>Issued also in: Croatian, Czech, French, German, Hungarian, Italian, Romanian, and Russian. 
<br/><br/><label>ISSN: </label>0213-4721 
<br/><br/><label>LCCN: </label>87644441 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Art, Modern--20th century--Periodicals.
<br/><br/><label>LC Class. No.: </label>PN6  / .L39xF NX456  / .L45 
<br/><br/><label>Dewey Class. No.: </label>709.04