Paraquin, Karl Heinz. <br/><br/>
Juegos visuales / 
Karl H. Paraquin ; [traductor, Pablo Sorozábal Serrano]. 
 - 4a. ed. 
 - Barcelona :  Labor,  c1978. 
 - 137 p. :  ill. ;  19 cm. 
 - Labor bolsillo juvenil ;  16 .
<br/><br/> Tít. Orig.: Schummelbilder. 
<br/><br/> A collection of over 100 optical illusion puzzles, with explanations of the reasons for their effects. 
<br/><br/><label>ISBN: </label>8433584162 9788433584168 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optical illusions--Juvenile literature.<br/>Puzzles--Juvenile literature.<br/>Optical illusions.<br/>Puzzles.<br/>Ilusiones ópticas.<br/>Rompecabezas.
<br/><br/><label>LC Class. No.: </label>QP 495  / P223j 1978