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Smallpox in Sierra Leone
I. Epidemiology
Donald R. Hopkins
,
J. Michael Lane
,
Evelyn C. Cummings
, and
J. Donald Millar
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