@misc{indiciae6872e4ec814b,
  title = {Geologic map of the Blackburn Hills volcanic field},
  author = {E. J. Moll-Stalcup and W.W. Patton},
  year = {1992},
  doi = {10.3133/mf2199},
  url = {https://pubs.usgs.gov/publication/mf2199},
  note = {Source identifier: mf2199}
}