Walford's guide to reference material. 

 - 7th ed. 
 - London :  Library Association, 1998-. 
 - volúmenes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Obras de consulta--Bibliografía
<br/><br/><label>LC Class. No.: </label>C/Z1035.1/W35 1998