Rodríguez Briz, Fernanda <br/><br/>
Los servicios de referencia virtual  surgimiento, desarrollo y perspectivas a futuro 
Fernanda Rodríguez Briz. 
 - 1. ed. 
 - Buenos Aires  Alfagrama  2005. 
 - 156 p.  ill.  22 cm. 
<br/><br/>Includes bibliographical references (p. 143-156). 
<br/><br/><label>ISBN: </label>9872207429 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic reference services Libraries<br/>Internet in library reference services<br/>Reference services (Libraries)--Information technology.