TY  - BOOK
AU  - Eldridge Sandra
AU  - Kerry Sally
TI  - Practical guide to cluster randomised trials in health services research
SN  - 978-0-470-51047-6
U1  - 000SB:362.1072 
PY  - 2012///
CY  - Chichester
PB  - John Wiley
KW  - Cluster analysis
KW  - Health services-research
KW  - Randomized controlled trials
ER  -