@misc{indiciaecac6156d3c41,
  title = {In situ determination of particle friction angles of fluvial gravels},
  author = {Christopher E. Johnston and E.D. Andrews and John Pitlick},
  year = {1998},
  doi = {10.1029/98wr00312},
  url = {https://pubs.usgs.gov/publication/70020811},
  note = {Source identifier: 70020811}
}