TY - GEN AU - FB Silsbee C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1948-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.LCIRC.901 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1948 TI - Letter Circular 901::the fundamental basis for the standardization of electrical instruments and meters ER -