Encyclopedia of library and information science / 
executive editor Allen Kent. 
 - New York :  Marcel Dekker,  <1992-     > 
 - v. <49-   > :  ill. ;  26 cm. 
<br/><br/> "Supplement 12" 
<br/><br/>Inclueds bibliographical references. 
<br/><br/><label>ISBN: </label>0824720490 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Libraries--Encylopedias.<br/>Information Science--Encyclopedias.
<br/><br/><label>LC Class. No.: </label>Z1006  / .E55 1992