Holmberg, Borje, <br/><br/>
Theory and practice of distance education / 
Borje Holmberg 
 - 2 
 - páginas 
 - Routledge studies in distance education .
<br/><br/><label>ISBN: </label>0415112923 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educación a distancia
<br/><br/><label>LC Class. No.: </label>LC5800  / H65