A cowboy with a syringe used to immunize cows against Blackleg - a fatal disease that strikes cattle aged 6 months to 2 years. Montana, 1939.Photo by Arthur Rothstein. [American Memory link]
Mar 9, 2009
Disease Prevention
A cowboy with a syringe used to immunize cows against Blackleg - a fatal disease that strikes cattle aged 6 months to 2 years. Montana, 1939.Photo by Arthur Rothstein. [American Memory link]
