@misc{indiciae3307ea438a06,
  title = {A general evaluation of the frequency distribution of clay and associated minerals in the alluvial soils of Ceylon},
  author = {J.W. Herath and R.W. Grimshaw},
  year = {1971},
  doi = {10.1016/0016-7061(71)90017-6},
  url = {https://pubs.usgs.gov/publication/70009789},
  note = {Source identifier: 70009789}
}