@misc{indiciae21576a2d0f96,
  title = {Geologic map of the Houlton quadrangle, Aroostook County, Maine},
  author = {Louis Pavlides},
  year = {1971},
  doi = {10.3133/gq920},
  url = {https://pubs.usgs.gov/publication/gq920},
  note = {Source identifier: gq920}
}