@misc{indiciae9c720ac8de06,
  title = {Introductory text},
  author = {Grecia R. Matos and Lisa D. Miller and James J. Barry},
  year = {2015},
  doi = {10.3133/ds896},
  url = {https://pubs.usgs.gov/publication/ds896},
  note = {Source identifier: ds896}
}