@misc{indiciaef97297057d9c,
  title = {Distribution of scandium between coexisting biotite and hornblende in igneous rocks},
  author = {Robert I. Tilling and L. Paul Greenland and D. Gottfried},
  year = {1969},
  doi = {10.1130/0016-7606(1969)80[651:dosbcb]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70211006},
  note = {Source identifier: 70211006}
}