Van Sommers, Peter. <br/><br/>
Drawing and cognition :  descriptive and experimental studies of graphic production processes. 

 - Cambridge :  Cambridge University Press,  1984. 
 - 284p. 
<br/><br/> Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0521250951 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drawing, Psychology of.<br/>Drawing ability.<br/>Drawing ability in children.