G. Carlsen, Robert. <br/><br/>
Perception / 
G. Robert Carlsen, Ruth Christoffer Carlsen. 
 - 2nd  ed. 
 - New York :  McGraw-Hill,  1989. 
 - ix, 662  p. 
<br/><br/><label>ISBN: </label>0070103666 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>College readers.