@mastersthesis{78250,
  author = {ECMWF},
  title = {Newsletter No. 81 - Autumn 1998},
  abstract = {<ul><li>Elizabeth Blades - Obituary</li><li>Changes to the Operational Forecasting System</li><li>Recent improvements to the ECMWF 4D-Var data assimilation system</li><li>Recent experiments on 4D-Var and first results from a simplified Kalman filter</li><li>The ECMWF implementation of 3D-Var: Formulation, structure functions and experimental results</li><li>TAN-34 and DAWN - an update</li><li>NAG news</li></ul>
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},
  year = {1998},
  journal = {ECMWF Newsletter},
  month = {10/1998},
  language = {eng},
}