TY  - JOUR
A1  - Blakely, T.A.
A1  - Woodward, A.J.
T1  - Ecological effects in multi-level studies
Y1  - 2000
DO  - 10.1136/jech.54.5.367
JF  - Journal of Epidemiology and Community Health
VL  - 54
IS  - 5
SP  - 367
EP  - -374

ER  -