TY  - BOOK
AU  - Grace,Catherine O'Neill
TI  - You won't believe your eyes!
SN  - 0870446118 :
AV  - QP495 .O54 1987
U1  - 152.1/48 19
PY  - 1987///
CY  - Washington, D.C.
PB  - National Geographic Society
KW  - Optical illusions
KW  - Juvenile literature
KW  - Visual perception
N1  - Includes index; Bibliography: p. [103]
N2  - Introduces the world of visual illusion describing the workings of the eye-brain system and how different types of illusions occur
ER  -