TY  - BOOK
AU  - Lews-Beck,Michael S.
TI  - Experimental design and methods / 
T2  - International hand books of quantitative applications in the social science;v.2, 
SN  - 0803954298
U1  - 300.72 
PY  - 1993///
CY  - London : 
PB  - Sage Publications , 
KW  - SOCIAL SCIENCES-RESEARCH
N1  - NULL
ER  -