@misc{1190866,
  author = {R E Grantham and J J Freeman},
  title = {A standard of attenuation for microwave measurements:},
  year = {1948},
  month = {1948-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CRPL.9-8},
  language = {en},
}