@misc{indiciae0b4b3af4389b,
  title = {The gabbros and associated rocks at Preston, Connecticut},
  author = {G. F. Loughlin},
  year = {1912},
  doi = {10.3133/b492},
  url = {https://pubs.usgs.gov/publication/b492},
  note = {Source identifier: b492}
}