@misc{indiciae6c90fa936354,
  title = {Recent estimates of the abundances of the elements in the earth's crust},
  author = {Michael Fleischer},
  year = {1953},
  doi = {10.3133/cir285},
  url = {https://pubs.usgs.gov/publication/cir285},
  note = {Source identifier: cir285}
}