Keegan, Desmond <br/><br/>
Theoretical principles of distance education/ 
by Desmond Keegan 
 - U.S.A and Canda;  Routledge,  c1993. 
 - xiii,272 p.  ill,;  23.7 cm. 
<br/><br/> Include index 
<br/><br/>Part I. Didactic underpinnings  --Part II. Academic underpinnings  --Part III. Analytic underpinnings  --Part IV. Philosophical underpinnings  --Part V. Technological underpinnings. 
<br/><br/><label>ISBN: </label>0-415-08942-5 
<br/><br/><label>Dewey Class. No.: </label>BCir.371.3  / T343 1993