@misc{indiciae5893f7af6ac7,
  title = {Potassium-argon ages of basement rocks from Saint George Island, Alaska},
  author = {D.M. Hopkins and M.L. Silberman},
  year = {1978},
  url = {https://pubs.usgs.gov/publication/70232571},
  note = {Source identifier: 70232571}
}