@misc{indiciae86d9bdace0c8,
  title = {Slide show on hierarchical systems analysis in karst terrains},
  author = {Kenneth E. Kolm and William H. Langer},
  year = {2000},
  doi = {10.3133/ofr00429a},
  url = {https://pubs.usgs.gov/publication/ofr00429A},
  note = {Source identifier: ofr00429A}
}