TY  - BOOK
AU  - Campbell,Michael J.
AU  - Machin,David
TI  - Medical statistics: a commonsense approach 
SN  - 0471987212
PY  - 1999///
CY  - Chichester
PB  - John Wiley & Sons
KW  - Biometry
KW  - methods
KW  - Research design
KW  - Statistics
ER  -