TY  - BOOK
AU  - Lewis-Beck, Michael
TI  - Experimental design and methods: Volume 3
T2  - International handbooks of quantitative applications in the social sciences
SN  - 0 8039 5429 8
U1  - 519.5 
PY  - 1993///
CY  - U.S.A.
PB  - SAGE Publications
ER  -