TY  - BOOK
AU  - Held, Richard; Richards, Whitman
TI  - Perception: Mechanisms and models
SN  - 0716708531
U1  - 153.7 HEL-P 22
PY  - 1972///
CY  - 
PB  - W H Freeman & Co., San Francisco
KW  - Perceptual processes; Psychology
ER  -