http://digfir-published.macmillanusa.com/hlw_visual_summary2e/hlw_visual_summary2e_44.html
Chapter
1. Diversity Through Time (Chapters 26, 27, 33, 34, 44)
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http://digfir-published.macmillanusa.com/hlw_visual_summary2e/hlw_visual_summary2e_44_dlap.xmlDLAP questions560187d3757a2e1241000000