@misc{indiciae734f1a6bf558,
  title = {Minor elements in Keweenawan lavas, Michigan},
  author = {H. R. Cornwall and H. J. Rose},
  year = {1957},
  doi = {10.1016/0016-7037(57)90033-9},
  url = {https://pubs.usgs.gov/publication/70009847},
  note = {Source identifier: 70009847}
}