TY - GEN AU - Lashof, T W C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1954-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.547 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1954 TI - Circular of the Bureau of Standards no. 547 section 1::precision laboratory standards of mass and laboratory weights ER -