@misc{indiciae15ee3014389b,
  title = {Discussion on mechanics of ripple formation by Dr. H. K. Liu},
  author = {M.L. Albertson and B.V. Richardson and D.B. Simons},
  year = {1957},
  doi = {10.3133/ofr572},
  url = {https://pubs.usgs.gov/publication/ofr572},
  note = {Source identifier: ofr572}
}