@misc{indiciae434659686709,
  title = {Applications of GIS and database technologies to manage a Karst Feature Database},
  author = {Y. Gao and R.G. Tipping and E.C. Alexander},
  year = {2006},
  url = {https://pubs.usgs.gov/publication/70028787},
  note = {Source identifier: 70028787}
}