@misc{indiciae6134fdc6bf12,
  title = {Interstellar Hydrogen and the Local System.},
  author = {D S Heeschen and A E Lilley},
  year = {1954},
  doi = {10.1073/pnas.40.12.1095},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589595/},
  note = {Source identifier: 16589595}
}