@phdthesis{75245,
  author = {H.-J. Koppert},
  title = {The interactive graphical system of DWD},
  year = {1991},
  journal = {Third Workshop on Meteorological Operational Systems, 18-22 November 1991},
  pages = {209-216},
  month = {1991},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}