Library of congress subject headings 

 - 9 ed. 
 - Washington :  The Library,  1980 
 - 2 v. 
<br/><br/><label>LCCN: </label>40104 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encabezamientos de materia.
<br/><br/><label>Dewey Class. No.: </label>025.33  / E8 1980