@misc{indiciaedc7b5db9c57a,
  title = {User’s guide for MapMark4GUI—A graphical user interface for the MapMark4 R package},
  author = {Jason L. Shapiro},
  year = {2018},
  doi = {10.3133/tm7c18},
  url = {https://pubs.usgs.gov/publication/tm7C18},
  note = {Source identifier: tm7C18}
}