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Donald R. Hopkins
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Donald R. Hopkins
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Donald R. Hopkins
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Donald R. Hopkins
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Donald R. Hopkins
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Donald R. Hopkins and Ernesto Ruiz-Tiben
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Robert M. Lewert, Donald R. Hopkins, and Samuel Mandlowitz
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Donald R. Hopkins, Ernesto Ruiz-Tiben, and Trenton K. Ruebush
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Smallpox in Sierra Leone

II. The 1968–69 Eradication Program

Donald R. Hopkins, J. Michael Lane, Evelyn C. Cummings, James N. Thornton, and J. Donald Millar
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