TY  - JOUR
A1  - Hall, S.A.
A1  - Kaufman, J.S.
A1  - Ricketts, T.C.
T1  - Defining urban and rural areas in US epidemiologic studies
Y1  - 2006
DO  - 10.1007/s11524-005-9016-3
VL  - 83
IS  - 2

ER  -