Competitive foods in schools: availability and purchasing in predominately rural small and large high schools.
Nollen NL, Befort C, Davis AM, Snow T, Mahnken J, Hou Q, Story M, Ahluwalia JS. Competitive foods in schools: availability and purchasing in predominately rural small and large high schools. J Am Diet Assoc. 2009 May; 109(5):857-64.