TY  - BOOK
AU  - Cochran, William G.
AU  - Moses, Lincoln E.
AU  - Mosteller, Frederick
TI  - Planning and analysis of observational studies
T2  - Wiley series in Probability and Mathematical Statistics
U1  - 519.50184 
PY  - 1983///
CY  - New York
PB  - John Wiley
ER  -