Professor Koch on the bacteriological diagnosis of cholera ; Water-filtration and cholera ; and, The cholera in Germany during the winter of 1892-93 / translated by George Duncan.

Licence: Public Domain Mark

Credit: Professor Koch on the bacteriological diagnosis of cholera ; Water-filtration and cholera ; and, The cholera in Germany during the winter of 1892-93 / translated by George Duncan. Source: Wellcome Collection.