@misc{indiciae75b46943ea32,
  title = {Seismic waves reflected from the Earth's inner core.},
  author = {E R Engdahl and E A Flinn and C F Romney},
  year = {1970},
  doi = {10.1038/228852a0},
  url = {https://pubmed.ncbi.nlm.nih.gov/16058729/},
  note = {Source identifier: 16058729}
}