@manual{75291,
  author = {P.W. Kållberg and Adrian Simmons and S. Uppala and Manuel Fuentes},
  title = {The ERA-40 archive. [Revised October 2007]},
  year = {2004},
  journal = {ERA-40 Project Report Series},
  number = {17},
  pages = {31},
  month = {09/2004},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}