http://digfir-published.macmillanusa.com/hm_custom_osu/potter_50324_tpm_questions.html\tChapter 2.
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http://digfir-published.macmillanusa.com/hm_custom_osu/potter_50324_tpm_questions_dlap.xml\tDLAP questions\t5239acb9757a2ed415000000