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1كتاب
المؤلفون: Mansfield, Wendy, 1963-
المساهمون: Farris, Elizabeth., National Center for Education Statistics.
مصطلحات موضوعية: School discipline -- United States -- Statistics., Drug abuse -- United States -- Prevention -- Statistics., Educational surveys -- United States., School discipline -- United States., Drug abuse -- United States -- Prevention., School principals -- United States -- Attitudes.