@misc{indiciae81107200c138,
  title = {Anisotropic magnetic susceptibility of erbium and ytterbium in zircon, ZrSiO4},
  author = {A. N. Thorpe and Charles Briggs and T. Tsang and F. Senftle and Corrine Alexander},
  year = {1977},
  doi = {10.1016/0022-3697(77)90180-9},
  url = {https://pubs.usgs.gov/publication/70009837},
  note = {Source identifier: 70009837}
}