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  • The anthrax bacillus: ten examples, as seen through a microscope. Colour photograph, ca. 1948, after A. Assmann, ca. 1876, after R. Koch and F. Cohn, ca. 1876.
  • The anthrax bacillus: ten examples, as seen through a microscope. Colour photograph, ca. 1948, after A. Assmann, ca. 1876, after R. Koch and F. Cohn, ca. 1876.