@misc{indiciaed01b1acf673f,
  title = {A field trip guidebook to the type localities of Marland Billings' 1935 Paleozoic bedrock stratigraphy near Littleton, New Hampshire},
  author = {Douglas W. Rankin and Mary B. Rankin},
  year = {2014},
  doi = {10.3133/ofr20141026},
  url = {https://pubs.usgs.gov/publication/ofr20141026},
  note = {Source identifier: ofr20141026}
}