Thomas, David B
,
McCormack, William M
,
Arita, Isao
,
Khan, Malik Muzaffer
,
Islam, Shafiqul
,
Mack, Thomas M
,
World Health Organization. Smallpox Eradication Unit
,
[Endemic smallpox in a rural area / by David B. Thomas, William M. McCormack, Isao Arita, Muzaffer Khan, Shafiqul Islam and Thomas M. Mack]
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