@misc{indiciae069454e3164f,
  title = {US Topo: topographic maps for the nation},
  author = {William J. Carswell},
  year = {2013},
  doi = {10.3133/fs20133093},
  url = {https://pubs.usgs.gov/publication/fs20133093},
  note = {Source identifier: fs20133093}
}