Dubery,  Fred <br/><br/>
Drawing systems / 
Fred Dubery and John Willats. 
 - London :  Studio Vista,  c1972. 
 - 96 p. : ill. 
<br/><br/><label>ISBN: </label>0289701392 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drawing--Technique.