TY  - BOOK
AU  - Bowling,Ann
TI  - Research methods in health: investigating health and health services 
SN  - 0335206441
PY  - 2002///
CY  - Buckingham
PB  - Open University Press
KW  - Research design
KW  - Public health
KW  - Health Services
N1  - References : p. 439-478
ER  -