@misc{indiciaefbfadc387595,
  title = {A method of measuring and plotting the shapes of pebbles},
  author = {C.K. Wentworth},
  year = {1923},
  doi = {10.3133/b730c},
  url = {https://pubs.usgs.gov/publication/b730C},
  note = {Source identifier: b730C}
}