TY  - BOOK
AU  - Vernopn,Magdalene Dorothea
TI  - Experiments in visual perception : : selected readings / 
U1  - 153.7 
PY  - 1966///
CY  - Harmondsworth : 
PB  - Penguin Books, 
KW  - Visual perception
N1  -  Includes bibliographical references (p.431-434) and index
ER  -