World encyclopedia of library and information services  / 
[Robert Wedgeworth, editor]. 
 - 3rd ed. 
 - Chicago :  American Library Association,  1993. 
 - xvii, 905 p. :  ill. 
<br/><br/><label>ISBN: </label>0838906095 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science--Encyclopedias.<br/>Information science--Encyclopedias.