TY  - BOOK
AU  - de Groot A D
AU  - Spiekerman J A A
TI  - Methodology: foundations of inference and research in the behavioral Sc
U1  - 150.1943 
PY  - 1969///
CY  - Paris
PB  - Mouton
KW  - Behavioristic psychology
KW  - Methodology
ER  -