![](/img/cover-not-exists.png)
Objective and perceived availability of physical activity opportunities: differences in associations with physical activity behavior among urban adolescents
Richard G Prins, Anke Oenema, Klazine van der Horst, Johannes BrugVolume:
6
Language:
english
DOI:
10.1186/1479-5868-6-70
Date:
December, 2009
File:
PDF, 475 KB
english, 2009