Osborne, C .W. <br/><br/>
International Yearbook of Educational and Instructional technology 1986 / 87 

 - London  Kogan Page Limited  1986 
 -  22 .5 cm 
<br/><br/><label>ISBN: </label>0 89397 239 8 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>371. 394