TY  - GEN
AU  - Ader , Herman J. ;ed.
AU  - Mellenbergh , Gideon J. ;ed.
TI  - Research methodology: in the life,behavioural and social sciences
SN  - 0761958843
U1  - 001.42 
PY  - 1999///
CY  - London
PB  - Sage Publications
KW  - RESEARCH METHODS
KW  - GENERALITIES
ER  -