http://digfir-published.macmillanusa.com/video_human_comm_accessible/video_human_comm_accessible_ch12.html
Chapter
12. Attention getter (NEEDS IMPROVEMENT)
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http://digfir-published.macmillanusa.com/video_human_comm_accessible/video_human_comm_accessible_ch12_dlap.xmlDLAP questions59d611797894d29663000001