The Secret of Blood (Czech: Tajemství krve) is a 1953 Czechoslovak biographical drama film directed by Martin Frič about Czech doctor Jan Janský who discovered and classified the four different blood types.[1] It competed at 14th Venice International Film Festival.

Cast

References

  1. ^ "Tajemství krve". csfd.cz (in Czech). Retrieved 26 October 2020.


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