@misc{indiciaeb6108c6ece93,
  title = {A navigation model for the Venusian atmosphere},
  author = {Birkeland, P. W. and Williams, B. G. and Konopliv, A. S.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810061387},
  note = {Source identifier: 19810061387}
}