@misc{indiciae77803e75ce08,
  title = {Louisiana clays, including the results of tests made in the laboratory of the Bureau of Standards at Pittsburgh},
  author = {G.C. Matson},
  year = {1918},
  doi = {10.3133/b660e},
  url = {https://pubs.usgs.gov/publication/b660E},
  note = {Source identifier: b660E}
}