@misc{indiciae4b044c12f0ad,
  title = {The current status of mapping karst areas and availability of public sinkhole-risk resources in karst terrains of the United States},
  author = {Eve L. Kuniansky and David J. Weary and James E. Kaufmann},
  year = {2015},
  doi = {10.1007/s10040-015-1333-3},
  url = {https://pubs.usgs.gov/publication/70160226},
  note = {Source identifier: 70160226}
}