TY - GEN AU - Mackey, Elizabeth A AU - Becker, Donala A AU - Oflaz, Rabia D AU - Paul, Rick L AU - Greenberg, Robert R AU - Lindstrom, Richard M AU - Yu, Lee L AU - Wood, Laura J AU - Long, Stephen E AU - Kelley, W Robert AU - Mann, Jacqueline L C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2004-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.260-156 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2004 TI - Certification of NIST Standard Reference Material 1575a pine needles and results of an international laboratory comparison: ER -