Faris Gene <br/><br/>
Improving the learning environment : A study on the local preparation of visual instructional materials 

 - Washington, USA  U.S. Government Printing Office   1963 
 - vi,148p. 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching Technique