Enciclopedia universal Sopena  diccionario ilustrado de la lengua española 

 - Barcelona  Editorial Ramón Sopena  1970 
 - 10 v.  ill., maps 
<br/><br/> Earlier editions published under title : Encyclopedia Sopena 
<br/><br/>Bibliography : v. 1, p. 9-13 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Enciclopedias and dictionaries, Spanish.