@misc{indiciaecf2c296a480c,
  title = {Gold abundance in igneous rocks; bearing on gold mineralization},
  author = {Robert I. Tilling and David Gottfried and Jack J. Rowe},
  year = {1973},
  doi = {10.2113/gsecongeo.68.2.168},
  url = {https://pubs.usgs.gov/publication/70211009},
  note = {Source identifier: 70211009}
}