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Download: Powerpoint presentation: pdf format
Download: Henry's problem: pdf document
Download: Henry's problem: PMWIN files
Download: Elder's problem: pdf document
Download: Elder's problem: PMWIN files
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Download: Powerpoint presentation: pdf format
Download: Henry's problem: pdf document
Download: Henry's problem: PMWIN files
Download: Elder's problem: pdf document
Download: Elder's problem: PMWIN files
...