Harris, N D C Hills, P J, ed.,series <br/><br/>
Preparing educational materials 

 - London  Croom helm  1979 
 - 147 p.; 22cm. 
 - New patterns of learning series .
<br/><br/><label>ISBN: </label>856649325 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational materials<br/>Learning assessment<br/>Learning purpose<br/>Teaching - aids and devices