TY  - BOOK
AU  - Beeler,Nelson F.
TI  - Experiments in optical illusion
U1  - 535.072 
PY  - 1951///
CY  - New York
PB  - Crowell
KW  - Optical illusions
KW  - sears
KW  - Local
KW  - Optics
KW  - Light
KW  - Experiments
N1  - Includes index
ER  -