Ryburn, W. M. <br/><br/>
Principles of teaching 
W. M. Ryburn and K. B. Forge 
 - 2nd edi. 
 - London  Oxford University Press  1957 
 - 216 p.  18 cm. 
<br/><br/><label>Dewey Class. No.: </label>371.3 RYB