@misc{indiciaec4d5ba47698a,
  title = {Rare earth element concentrations in geological and synthetic samples using synchrotron X-ray fluorescence analysis},
  author = {J.R. Chen and E. C. T. Chao and J.M. Back and J.A. Minkin and M.L. Rivers and S.R. Sutton and G.L. Cygan and J. N. Grossman and M.J. Reed},
  year = {1993},
  doi = {10.1016/0168-583x(93)95718-k},
  url = {https://pubs.usgs.gov/publication/70018287},
  note = {Source identifier: 70018287}
}