Guide to reference material. 

 - 3rd ed. / edited by A.J. Walford.  3rd ed. / edited by A.J. Walford. 
 - [London] :  Library Association,  1973- 
<br/><br/>Vol. 1. Science and technology -- v. 2. Social & historical sciences, philosophy & religion. 
<br/><br/><label>LCCN: </label>73174024 
<br/><br/><label>Nat. Bib. No.: </label>GB*** v. 1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reference books -- Bibliography.--Reference books -- Bibliography.
<br/><br/><label>LC Class. No.: </label>Z1035.1  / .W33 
<br/><br/><label>Dewey Class. No.: </label>011/.02