Elliot, Sergio. <br/><br/>
Distance education systems / 
Sergio Elliot. 
 - Rome :  FAO of the United Nations,  1990. 
 - iv, 73 p. :  ill 
 - FAO economic and social development paper ;  67 .
<br/><br/><label>ISBN: </label>9251024480 
<br/><br/><label>LCCN: </label>90074142 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Distance education--Methodology.<br/>Correspondence schools and courses.<br/>University extension.