TY  - BOOK
ED  - Smith, Peter J.
ED  - Morrow, Richard H.
ED  - Ross, David A.
TI  - Field trials of health interventions: a toolbox
SN  - 9780198732860 
PY  - 2015///
CY  - Oxford
PB  - Oxford University Press
KW  - Epidemiology
KW  - Research
UR  - http://oxfordmedicine.com/view/10.1093/med/9780198732860.001.0001/med-9780198732860?rskey=CrrS7x&result=1
ER  -