TY  - BOOK
AU  - Cochran,William Gemmell
AU  - Moses,Lincoln E.
AU  - Mosteller,Frederick
TI  - Planning and analysis of observational studies
SN  - 0471887196
U1  - 001.42 
PY  - 1983///
CY  - New York
PB  - Wiley
KW  - Experimental design
KW  - Analysis of variance
ER  -