TY - GEN AU - R S Kirby AU - F M Capps AU - R N Jones C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1954-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.546 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1954 TI - Circular of the Bureau of Standards no. 546::effective radio ground-conductivity measurements in the United States ER -