@misc{indiciae4c52d472d96d,
  title = {Potassium-argon ages of volcanic rocks from near Ankara, Central Turkey},
  author = {Jay A. Ach and Frederic H. Wilson},
  year = {1986},
  url = {https://pubs.usgs.gov/publication/70186748},
  note = {Source identifier: 70186748}
}