TY  - JOUR
A1  - Brownson, R.C.
A1  - Hoehner, C.M.
A1  - Day, K.
A1  - Forsyth, A.
A1  - Sallis, J.F. 
T1  - Measuring the built environment for physical activity: State of the science
Y1  - 2009
DO  - 10.2148/benv.35.1.122
JF  - American Journal of Preventive Medicine 
VL  - 36
IS  - 4s

ER  -