@misc{indiciaea01224d891d3,
  title = {Retrospective Data Assimilation for GEOS-4},
  author = {Todling, Ricardo and Giering, Ralf and Kaminski, Thomas and Zhu, Yan-Qiu and Guo, Jing},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20030111841},
  note = {Source identifier: 20030111841}
}