TY  - BOOK
AU  - Helm C E
ED  - Educational Testing Service and Princeton University. New Jersey
TI  - Multidimensional ratio scaling analysis of color relations: a technical report
U1  - 371.26 
PY  - 1959///
CY  - New Jersey
PB  - ETS
KW  - Color relations
KW  - Educational measurements
ER  -