@misc{indiciae200fae3555c3,
  title = {Absolute gf-values for Fe I and Fe II lines.},
  author = {Grasdalen, G. L. and Huber, M. and Parkinson, W. H.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690056315},
  note = {Source identifier: 19690056315}
}