Blood groups in man / R.R. Race and Ruth Sanger.

Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

You can copy and distribute this work, as long as it is not primarily intended for or directed to commercial advantage or monetary compensation. You should also provide attribution to the original work, source and licence. If you make any modifications to or derivatives of the work, it may not be distributed. Read more about this licence.

Credit

Blood groups in man / R.R. Race and Ruth Sanger. Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0). Source: Wellcome Collection.