作者: Samuel D. Brody , Sammy Zahran , Wesley E. Highfield , Sarah P. Bernhardt , Arnold Vedlitz
DOI: 10.1111/J.1539-6924.2009.01210.X
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摘要: … by a point system, with point maximums varying by specific action. To measure series 300 activities, we simply totaled the points earned by a county and divide by the maximum points …