@phdthesis{74882,
  author = {I. Holmstrom},
  title = {Empirical orthogonal function-expansion of geopotential and wind data using a geostrophic constant},
  year = {1977},
  journal = {Workshop on the use of Empirical Orthogonal functions in Meteorology},
  pages = {21-26},
  month = {1977},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}