@phdthesis{74182,
  author = {J.C. Derber and W-S. Wu and M. Zupanksi and D. Zupanksi and D. Parrish and J. Purser and E. Rogers and Y. Lin and G. DiMegro},
  title = {Variational assimilation of NCEP},
  year = {1996},
  journal = {Seminar on Data Assimilation, 2-6 September 1996},
  pages = {195-212},
  month = {1996},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}