@misc{indiciae7dd4dde4cd77,
  title = {Data on the hafnium dioxide content and the ratio of hafnium to zirconium in minerals and rocks},
  author = {Michael Fleischer},
  year = {1954},
  doi = {10.3133/tei413},
  url = {https://pubs.usgs.gov/publication/tei413},
  note = {Source identifier: tei413}
}