TY - GEN AU - G F Strouse AU - W L Tew C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2001-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.260-139 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2001 TI - Standard Reference Materials ::Standard reference material 1750 / ER -