@misc{91456,
  author = {Ben Davis and Chriss Grosvenor and Robert Johnk and David Novotny and James Baker-Jarvis and Michael Janezic},
  title = {Complex permittivity measurements of planar building materials using a UWB free-field antenna measurement system},
  year = {2007},
  number = {112},
  month = {2007-01-01},
  publisher = {Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}