Verduin, John R. and Clark, Thomas A. <br/><br/>
Distance education  : the foundations of effective practice 

 - San Francisco  ; Jossey-Bass Publishers  , 1991 
 - xvi,279p. 
<br/><br/><label>ISBN: </label>155542306X   
<br/><br/><label>Subjects--Topical Terms: </label><br/>Distance Education<br/>Education
<br/><br/><label>Dewey Class. No.: </label>374.4  / VER