@misc{indiciae35cdd23ac6b3,
  title = {Cassiopeia a absorption spectrum and the interarm medium.},
  author = {G de Jager},
  year = {1970},
  doi = {10.1038/225622a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/16056652/},
  note = {Source identifier: 16056652}
}