TY - GEN AU - Jeanice M. Brown Thomas AU - David L. Duewer AU - Margaret C. Kline AU - Katherine E. Sharpless AU - Willie E. May AU - Sam A. Margolis AU - Neal E. Craft C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2015-09-01 04:09:00 DO - https://doi.org/10.6028/NIST.IR.7880-33 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2015 TI - NIST Micronutrients Measurement Quality Assurance Program Winter, Spring, and Fall 1991 Comparability Studies: Results for Round Robins XXI, XXII, and XXIII Fat-Soluble Vitamins and Carotenoids in Human Serum: ER -