@misc{indiciaedb7c5c4bc9f4,
  title = {U-Pb zircon ages from the southwestern Karoo Basin, South Africa - Implications for the Permian-Triassic boundary},
  author = {A. Fildani and A. Weislogel and N.J. Drinkwater and T. McHargue and A. Tankard and J. Wooden and D. Hodgson and S. Flint},
  year = {2009},
  doi = {10.1130/g25685a.1},
  url = {https://pubs.usgs.gov/publication/70036659},
  note = {Source identifier: 70036659}
}