Russell, Osborne 1814-1892 Journal of a Trapper, or, Nine Years in the Rocky Mountains, 1834-1843: Being a General Description of the Country, Climate, Rivers, Lakes Mountains, ... of the Life Led by a Hunter in Those Regions

1843-1910, Koch Robert Professor Koch On The Bacteriological Diagnosis Of Cholera, Water-filtration And Cholera, And The Cholera In Germany During The Winter Of 1892-93

Russell, Osborne 1814-1892 Journal of a Trapper, or, Nine Years in the Rocky Mountains, 1834-1843: Being a General Description of the Country, Climate, Rivers, Lakes Mountains, ... of the Life Led by a Hunter in Those Regions