@misc{indiciaeeace74dc014d,
  title = {The National Map},
  author = {Larry J. Sugarbaker and William J. Carswell},
  year = {2011},
  doi = {10.3133/fs20113042},
  url = {https://pubs.usgs.gov/publication/fs20113042},
  note = {Source identifier: fs20113042}
}