Liu, Jia,  1968- <br/><br/>
The evaluation of worldwide digital reference services in libraries / 
Jia Liu. 
 - xv, 174 pages :  illustrations ;  24 cm. 
 - Chandos information professional series .
 - Chandos information professional series .
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>184334310X 9781843343103 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic reference services (Libraries)--Evaluation.