TY - GEN AU - R W Seward AU - W C Webster AU - T E Gills C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1983-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.260-84 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1983 TI - Standard Reference Materials:Sampling, materials handling, processing, and packaging of NBS sulfur in coal standard reference materials ER -