| http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_lab10_prelab8.html | Chapter 2. Writing Lab
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| http://digfir-published.macmillanusa.com/hm_custom_osu/hmlsu_wischusen_f13_lab10_prelab8_dlap.xml | DLAP questions | 51e4b62c757a2e1153000004 |