TY  - BOOK
AU  - Hayes, Richard. J
AU  - Moulton, Lawrence. H
TI  - Cluster Randomised Trials 
SN  - 9781498728225
PY  - 2017///
CY  - Boca Raton 
PB  - CRC Press
KW  -  Clinical trials. | Cluster analysis
N1  - Includes References and Index
ER  -