Mackenzie, Norman. <br/><br/>
Open Learning :  systems and problems in post-secondary education / 
Norman Mackenzie, Richmond Postgate and John Scupham. 
 - Paris :  The Unesco Press ,  1975. 
 - 498 p. ;  24 cm. 
<br/><br/>Bibliography : p.497 
<br/><br/>300   300  
<br/><br/><label>ISBN: </label>92-3-101326-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>University extension.<br/>Education, Higher
<br/><br/><label>Dewey Class. No.: </label>378 / M11o