@phdthesis{74562,
  author = {R. Gelaro and R.H. Langland and G.D. Rohaly and T.E. Rosmond},
  title = {The use of adjoint methods for adaptive observations},
  year = {1997},
  journal = {Workshop on Predictability, 20-22 October 1997},
  pages = {153-184},
  month = {1997},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}