@misc{indiciae031cfe4052e5,
  title = {Fission-track ages from the Precambrian of Shropshire},
  author = {C. W. Naeser and P. Toghill and R. J. Ross},
  year = {2009},
  doi = {10.1017/s0016756800025905},
  url = {https://pubs.usgs.gov/publication/70011846},
  note = {Source identifier: 70011846}
}