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  • NIST/NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results : Summer 2011 Exercise (Exercise 4) / Katrice A. Lippa.

    • Text
    • Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 2012.
    • 2012
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo98457

  • NIST/NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results : Summer 2010 (Exercise 2) / Katrice A. Lippa.

    • Text
    • Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 2012.
    • 2012
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo102177

  • NIST/NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results : Winter 2011 Comparability Study (Exercise 3) / Mary Bedner.

    • Text
    • Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 2012.
    • 2012
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo94946

  • NIST/NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results : Winter 2010 Comparability Study (Exercise 1) / Mary Bedner.

    • Text
    • Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 2012.
    • 2012
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo104809

  • NIST/NIH vitamin D metabolites quality assurance program report of participant results : winter 2012 comparability study (exercise 5) / Mary Bedner.

    • Text
    • Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 2013.
    • 2013
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo94756

  • An interlaboratory investigation of the effect of material granularity and sample processing on measurement variability : nutritional elements in cereals / Katrice A. Lippa; Laura J. Wood; Stefan D. Leigh; N. Alan Heckert.

    • Text
    • Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 2013.
    • 2013
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo98625

  • NIST/NIH vitamin D metabolites quality assurance program report of participant results : summer 2012 comparability study (exercise 6) / Katrice A. Lippa; Mary Bedner.

    • Text
    • Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 2013.
    • 2013
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo96963

  • NIST/NIH vitamin D metabolites quality assurance program report of participant results : Summer 2013 comparability study (exercise 7) / Mary Bedner; Katrice A. Lippa; Susan S. -C. Tai.

    • Text
    • Gaithersburg, MD : U.S. Dept. of Commerce, National Institute of Standards and Technology, 2015.
    • 2015
    • 1 Resource

    Available Online

    https://purl.fdlp.gov/GPO/gpo98017

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