TY  - BOOK
AU  - Groot, Adriaan D. De
AU  - Groot, Adriaan D. De
TI  - Mehtodology : foundations of inference and research in the behavioral sciences
U1  - S:44 
PY  - 1969///
CY  - Hague
PB  - Mouton & Co
KW  - S:44
ER  -