@misc{indiciae5e373fde8c80,
  title = {The doublet-ratio method and interstellar abundances.},
  author = {Nachman, P. and Hobbs, L. M.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730057901},
  note = {Source identifier: 19730057901}
}