@misc{indiciae30b4e7cf885a,
  title = {Map showing distribution of ultramafic and intrusive mafic rocks from New York to Maine},
  author = {D. M. Larrabee},
  year = {1971},
  doi = {10.3133/i676},
  url = {https://pubs.usgs.gov/publication/i676},
  note = {Source identifier: i676}
}