http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_appendixd.html\tChapter 2. Data Analysis and Presentation
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http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_appendixd_dlap.xml\tDLAP questions\t51e751e2757a2e4124000005