PT - JOURNAL ARTICLE ED - American Public Health Association TI - National parks program puts emphasis on outdoor activity: Let’s Move! campaign expands outside DP - 2010 Oct 01 TA - The Nation's Health PG - 8--8 VI - 40 IP - 8 4099 - http://www.thenationshealth.org/content/40/8/8.1.short 4100 - http://www.thenationshealth.org/content/40/8/8.1.full SO - Nations Health2010 Oct 01; 40