@manual{75841,
  author = {A. Nomura},
  title = {Global sea-ice concentration data set for use in the ECMWF re-analysis system},
  year = {1995},
  number = {76},
  pages = {25},
  month = {03/1995},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}