TY - GEN AU - Kanare, Howard M AU - Kirby, R Keith C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1988-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.260-110 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1988 TI - Standard Reference Materials ::Portland cement chemical composition standards (blending, packaging, and testing)/ ER -