@conference{conference,
  author = {D Meekhof and Steven Jefferts and D Lee and Craig Nelson},
  title = {Preliminary Results from the NIST Cs Fountain Frequency Standard},
  year = {1998},
  month = {1998-01-01 00:01:00},
  publisher = {CPEM {\textquoteright}{\textquoteright}98 , Washington, DC, USA},
  language = {en},
}