TY  - BOOK
AU  - Machin, David
AU  - Campbell, Michael J
AU  - Walters, Stephen J
TI  - Medical statistics: a textbook for the health sciences/4th ed
SN  - 978-81-265-3838-6
U1  - 51-7 
PY  - 2007///
CY  - New Delhi
PB  - Willey
KW  - Medical statistics
ER  -