References
Beardmore, J. A. & Karimi-Booshehri, F. Nature 303, 522–524 (1983).
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HARTUNG, J. Blood group and socio-economic class. Nature 309, 398 (1984). https://doi.org/10.1038/309398b0
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DOI: https://doi.org/10.1038/309398b0