TY - JOUR AU - David Duewer AU - Margaret Kline AU - Katherine Sharpless AU - Jeanice Brown AU - M. Stacewicz-Sapuntzakis AU - A. Sowell C2 - Analytical Chemistry DA - 2000-08-01 LA - en M1 - 72 PB - Analytical Chemistry PY - 2000 TI - NIST Micronutrients Measurement Quality Assurance Program: Characterizing Individual Participant Measurement Performance over Time ER -