@misc{indiciaed5a2a43689e1,
  title = {Fission-track and K-Ar ages of natural glasses},
  author = {Charles W. Naeser and Glen Arthur Izett and John D. Obradovich},
  year = {1980},
  doi = {10.3133/b1489},
  url = {https://pubs.usgs.gov/publication/b1489},
  note = {Source identifier: b1489}
}