@misc{1191456,
  author = {Frank M Greene},
  title = {Circular of the Bureau of Standards no. 517::calibration of commercial radio field-strength meters at the National Bureau of Standards},
  year = {1951},
  month = {1951-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CIRC.517},
  language = {en},
}