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Differentiation of Vitamin B12 Active Compounds by Ionophoresis and Microbiological Assay: Occurrence of the Various Vitamin B12 Active Compounds

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FORD, J., HOLDSWORTH, E., KON, S. et al. Differentiation of Vitamin B12 Active Compounds by Ionophoresis and Microbiological Assay: Occurrence of the Various Vitamin B12 Active Compounds. Nature 171, 150–151 (1953). https://doi.org/10.1038/171150a0

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