@misc{indiciaec78f0925d511,
  title = {Progress toward a preliminary karst depression density map for the conterminous United States},
  author = {Daniel H. Doctor and Jeanne M. Jones and Nathan J. Wood and Jeff T. Falgout and Natalya Igorevna Rapstine},
  year = {2020},
  doi = {10.5038/9781733375313.1003},
  url = {https://pubs.usgs.gov/publication/70217880},
  note = {Source identifier: 70217880}
}