TY - GEN AU - J H Dellinger AU - C B Jolliffe C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1930-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.385 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1930 TI - Circular of the Bureau of Standards no. 385:: ER -