@manual{79534,
  keywords = {Annual Report},
  author = {ECMWF},
  title = {Annual Report 1991},
  year = {1992},
  journal = {ECMWF Annual Report},
  month = {1992},
  publisher = {ECMWF},
  address = {Reading},
  url = {https://www.ecmwf.int/node/16283},
  language = {eng},
}