Beeler, Nelson F. <br/><br/>
Experiments in optical illusion 
Nelson F. Beeler and Franklyn M. Branley; illus. by Fred H. Lyon. 
 - New York  Crowell  1951. 
 - 114p  illus. 
<br/><br/> Includes index. 
<br/><br/><label>LCCN: </label>CCC89034183  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optical illusions.<br/>Optics<br/>Light--Experiments
<br/><br/><label>Dewey Class. No.: </label>535.072