@phdthesis{74117,
  author = {R. Daley},
  title = {The atmospheric data assimilation problem - past, present and future},
  year = {1989},
  journal = {Seminar on 10 years of Medium-range Weather Forecasting, 4-8 September 1989},
  volume = {I},
  pages = {3-10},
  month = {1989},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}