Kartogramma "grippa" : [Russia], 1890. Shows occurrence of influenza by province. Each map has a number at head of title, and a month or months at the end of the title: No. 50. Kartogramma "grippa" okti?a?br' 1889-mart 1890. Pulkovo and Ferro meridians.

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Size: 6410px × 4504px
Photo credit: © Heritage Images / Alamy / Afripics
License: Licensed
Model Released: No

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