TY  - GEN
AU  - Ader, Herman J
AU  - Mellenbergh, Gideon J
TI  - Research methodology in the life, behaviroural and social sciences
SN  - 0761958843
U1  - 300.072 
PY  - 1999///
CY  - London
PB  - Sage
KW  - SOCIAL SCIENCE
ER  -