@misc{indiciae659b3e431f2a,
  title = {Halloysite and allophane},
  author = {C. S. Ross and P. F. Kerr},
  year = {1934},
  doi = {10.3133/pp185g},
  url = {https://pubs.usgs.gov/publication/pp185G},
  note = {Source identifier: pp185G}
}