@misc{73923,
  author = {Carla Cardinali and Erik Andersson and P. Viterbo and Jean-Noël Thépaut and Drasko Vasiljevic},
  title = {Use of conventional surface observations in three-dimensional variational assimilation},
  year = {1994},
  journal = {ECMWF Technical Memoranda},
  number = {207},
  pages = {31},
  month = {11/1994},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/8577},
  doi = {10.21957/p6p470k5x},
  language = {eng},
}