TY  - GEN
AU  - Armitage,P.
AU  - Berry, G.
TI  - Statistical methods in medical research
SN  - 0632015012
AV  - 2nd ed. 
PY  - 1987///
CY  - Oxford : 
PB  - Blackwell Scientific Publications
KW  - Biometry
KW  - Statistics
KW  - Methods
KW  - Research
ER  -