@misc{indiciae4f7b6a2feb48,
  title = {The Evolution of Stratospheric Data Assimilation Systems},
  author = {Rood, Richard B. and Einaudi, Franco},
  year = {2001},
  url = {https://ntrs.nasa.gov/citations/20020015679},
  note = {Source identifier: 20020015679}
}