@phdthesis{75124,
  author = {P.W. Kållberg},
  title = {ERA-40 hydrological cycle},
  year = {2003},
  journal = {ECMWF/GEWEX Workshop on Humidity Analysis, 8-11 July 2002},
  number = {3},
  pages = {101-106},
  month = {2003},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}