@misc{indiciae1d3d8b09dc2d,
  title = {Geology of the Green Mountains in Massachusetts},
  author = {Raphael Pumpelly and John Eliot Wolff and T. Nelson Dale},
  year = {1894},
  doi = {10.3133/m23},
  url = {https://pubs.usgs.gov/publication/m23},
  note = {Source identifier: m23}
}