@misc{indiciae3c4fc16793f5,
  title = {One person's story about three decades of his research on igneous rocks},
  author = {W. A. Duffield},
  year = {1998},
  doi = {10.1016/s0377-0273(98)00072-9},
  url = {https://pubs.usgs.gov/publication/70020277},
  note = {Source identifier: 70020277}
}