@misc{indiciaeb03d2f7a89d9,
  title = {Dark Nebulae.},
  author = {H N Russell},
  year = {1922},
  doi = {10.1073/pnas.8.5.115},
  url = {https://pubmed.ncbi.nlm.nih.gov/16586859/},
  note = {Source identifier: 16586859}
}