@conference{84401,
  author = {Richard Geyer},
  title = {Complex Permittivity Measurements of Extremely Low Loss Dielectric Materials Using Whispering Gallery Modes},
  year = {1997},
  month = {1997-06-01},
  publisher = {Tech. Dig.,   IEEE MTT-S International Microwave Symposium, Denver, CO},
  language = {en},
}