@misc{indiciae9574994d0ec1,
  title = {Preparation of reference materials for particle-size analysis of silts and clays},
  author = {Bruce M. Delaney and L.J. Schroder},
  year = {1979},
  doi = {10.3133/ofr791590},
  url = {https://pubs.usgs.gov/publication/ofr791590},
  note = {Source identifier: ofr791590}
}