@misc{1191211,
  author = {J R Johler and L C Walters},
  title = {Circular of the Bureau of Standards no. 573::phase of the low radiofrequency ground wave},
  year = {1956},
  month = {1956-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CIRC.573},
  language = {en},
}