TY  - BOOK
AU  - Martin,Bill
AU  - Strimban,Robert
AU  - Strimban,Jack
TI  - Optical illusions,
AV  - PZ10.M445 Op
U1  - 152.1 
PY  - 1965///]
CY  - New York
PB  - Holt, Rinehart and Winston
KW  - Optical illusions
KW  - Juvenile literature
N1  - "A Wise owl book."
N2  - Presents a number of common optical illusions, without explanation of the reasons for their effects
UR  - http://www.archive.org/details/opticalillusions00mart
UR  - http://www.openlibrary.org/books/OL5943199M
ER  -