The Impact of State Laws and District Policies on Physical Education and Recess Practices in a Nationally Representative Sample of US Public Elementary Schools.
Slater, Sandy J. PhD; Nicholson, Lisa PhD; Chriqui, Jamie PhD, MHS; Turner, Lindsey PhD; Chaloupka, Frank PhD
Archives of Pediatrics & Adolescent Medicine.
166(4):311-316, April 2012.
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