Teaching and learning at a distance :  Foundations of distance education / 
Michael Simonson...[et.al]. 
 - xiv, 241 pages. 
<br/><br/> Includes bibliographical references ad index. 
<br/><br/><label>ISBN: </label>0-13-769258-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Distance education.