@phdthesis{75957,
  author = {S. Pawson},
  title = {Some recent results obtained with NASA's GEOS-4 DAS},
  year = {2004},
  journal = {ECMWF/SPARC Workshop on Modelling and Assimilation for the Stratosphere and Tropopause, 23 to 26 June 2003},
  pages = {169-178},
  month = {2004},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}