Walford, A. J. <br/><br/>
Walford's concise guide to reference material /  
edited by A. J. Walford. 
 - [1st ed.]. 
 - London :   The Library Association,   [1981] 
 - X, 434 p. ;   24 cm. 
<br/><br/>Contiene: I: Science & technology. X, 697 p. -- II: Social & historical sciences, philosophy & religion... 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Obras de referencia---Bibliografías.