TY  - BOOK
AU  - Underwood Benton J.
TI  - Psychological research
T2  - Century psychology series
U1  - b48(S), J7-;1 (ES) 
PY  - 1957///
CY  - New York
PB  - Appleton-Century-Crofts      
KW  - RESEARCH METHODS
ER  -