Virtual reference service :  : from competencies to assessment. 

 - 1st ed. 
 - London :  Facet publishing,  2008. 
 - 206 p.  
 - The virtual reference desk series. .
<br/><br/> Paperback. 
<br/><br/><label>ISBN: </label>1555705286 9781555705282 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library & information sciences.<br/>Reference And Information Services.<br/>Language Arts & Disciplines.<br/>Reference.<br/>Language.<br/>Language Arts & Disciplines / Library & Information Science.<br/>Reference / General.<br/>Library & Information Science - General.<br/>Electronic reference services (Libraries)<br/>Information technology.<br/>Reference services (Libraries)<br/>Study and teaching.<br/>Library & Information Science.
<br/><br/><label>Dewey Class. No.: </label>025.52  / VIR