@misc{indiciaef6fa0b74fe7a,
  title = {Minor-element and Sr-isotope geochemistry of tertiary stocks, Colorado mineral belt},
  author = {E.C. Simmons and C. E. Hedge},
  year = {1978},
  doi = {10.1007/bf00383298},
  url = {https://pubs.usgs.gov/publication/70012643},
  note = {Source identifier: 70012643}
}