INFECTIOUS DISEASES IN HISTORY. A guide to their causes and effects. Prepared by Brian Williams BA (Hons) in 1997 [1] [Архівовано 12 лютого 2012 у Wayback Machine.]
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INFECTIOUS DISEASES IN HISTORY. A guide to their causes and effects. Prepared by Brian Williams BA (Hons) in 1997 [1] [Архівовано 12 лютого 2012 у Wayback Machine.]