TY - GEN AU - Martin, J F C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1971-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.260-26 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1971 TI - Standard Reference Materials ::National Bureau of Standards - U. S. Steel Corporation joint program for determining oxygen and nitrogen in steel/ ER -