@misc{indiciaee185cd6e4b12,
  title = {Concepts of karst development in relation to interpretation of surface runoff},
  author = {H. E. LeGrand and V. T. Stringfield},
  year = {1973},
  url = {https://pubs.usgs.gov/publication/70160710},
  note = {Source identifier: 70160710}
}