TY  - BOOK
AU  - Leeman,Fred
AU  - Elffers,Joost
AU  - Schuyt Michael
TI  - Hidden images: games of perception, anamorphic art, illusion : from the Renaissance to the present 
SN  - 0810990199
AV  - N7430.5 
PY  - 1976///
CY  - New York
PB  - H. N. Abrams
KW  - Visual perception
KW  - Optical illusions
KW  - Perspective
N1  - German translation has title: Anamorphosen
ER  -