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David Ewing Duncan

Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year
1999
 Amgen Story : 25 Years of Visionary Science and Powerful Medicine
Amgen Story : 25 Years of Visionary Science and Powerful Medicine
2005
 From Cape to Cairo: An African Odyssey
From Cape to Cairo: An African Odyssey
1989