@misc{indiciaeed238b868666,
  title = {Potassium-argon ages of basement rocks from St. George Island, Alaska},
  author = {Miles L. Silberman and David Moody Hopkins},
  year = {1976},
  doi = {10.3133/ofr76733},
  url = {https://pubs.usgs.gov/publication/ofr76733},
  note = {Source identifier: ofr76733}
}