TY  - RPRT
TI  - Circular of the Bureau of Standards no. 573: phase of the low radiofrequency ground wave
AU  - Johler, J R
AU  - Walters, L C
PY  - 1956
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 573
DO  - 10.6028/NBS.CIRC.573
ER  -