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. 1933;27(4):1302–1309. doi: 10.1042/bj0271302

The vitamin D activity of butter

A chemical differentiation of the antirachitic factor of autumn and winter butter from irradiated ergosterol and the vitamin D of cod-liver oil1

Stanisƚaw Kazimierz Kon 1, Roland Gordon Booth 1
PMCID: PMC1253025  PMID: 16745227

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