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  "title": "SRM 2969 Vitamin D Metabolites in Frozen Human Serum (Total 25-Hydroxyvitamin D Low Level) Data",
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      "title": "Certification of Standard Reference Materials\u00ae 2969 and 2970: Vitamin D Metabolites in Frozen Human Serum (Total 25-Hydroxyvitamin D Low Level) and (25-Hydroxyvitamin D2 High Level)",
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      "citation": "Hahm, G., Nelson, M., Camara, J., & Toman, B. (2021). Certification of Standard Reference Materials\u00c2\u00ae 2969 and 2970: Vitamin D Metabolites in Frozen Human Serum (Total 25-Hydroxyvitamin D Low Level) and (25-Hydroxyvitamin D2 High Level). https://doi.org/10.6028/nist.sp.260-210\n"
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