Hudson, W. <br/><br/>
Pictorial depth perception in sub-cultural groups in Africa / 
by W. Hudson 
 - Johannesburg :  National Institute for Personnel Research,  1960 . 
 - 183-208 p. :ill. ;  25 cm. 
<br/><br/> Detached from The Journal of Social Psychology, v. 52. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Picture interpretation tests.<br/>Projection (Psychology)
<br/><br/><label>Dewey Class. No.: </label>P 152.14 H83