(Q46765326)
Statements
1 reference
Smallpox in Sierra Leone. II. The 1968-69 eradication program (English)
1 reference
Hopkins DR
1 reference
Lane JM
1 reference
Cummings EC
1 reference
Thornton JN
1 reference
Millar JD
1 reference
1 September 1971
1 reference
20
1 reference
5
1 reference
697-704
1 reference