TY  - BOOK
AU  - Hansen,Bruce G.
AU  - Gatehell,Charles J.
TI  - Serpentine end matching: a test of visual perception 
U1  -  152.1422 
PY  - 1978///
CY  - Broomall
PB  - U.S. Dept. Agriculture
KW  - Visual perception
KW  - Visiones
KW  - Visual perceptiones
ER  -