@manual{75285,
  author = {P.W. Kållberg},
  title = {A channel version of the ECMWF grid-point model},
  year = {1977},
  number = {16},
  pages = {32},
  month = {12/1977},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}