Proceedings of the Seventh International Genetical Congress : Edinburgh, Scotland, 23-30 August 1939 / edited by R.C. Punnett.

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Proceedings of the Seventh International Genetical Congress : Edinburgh, Scotland, 23-30 August 1939 / edited by R.C. Punnett. Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0). Source: Wellcome Collection.