@phdthesis{75148,
  author = {V. Karhila and J. Rinne},
  title = {Determination of empirical orthogonal functions from a large sample},
  year = {1977},
  journal = {Workshop on the use of Empirical Orthogonal functions in Meteorology},
  pages = {84-96},
  month = {1977},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}