@misc{indiciaeb80b2af7493c,
  title = {Leaching of clay minerals in a limestone environment},
  author = {D. Carroll and H.C. Starkey},
  year = {1959},
  doi = {10.1016/0016-7037(59)90048-1},
  url = {https://pubs.usgs.gov/publication/70009821},
  note = {Source identifier: 70009821}
}