@misc{indiciae927faf8ef4af,
  title = {What a = 1/298 and C/Ma 2 = 0.333 really tell us about the Earth},
  author = {J. F. Evernden},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/70020092},
  note = {Source identifier: 70020092}
}