@misc{indiciaee8e5af7166b3,
  title = {Monitoring beach changes using GPS surveying techniques},
  author = {Robert Morton and Mark P. Leach and Jeffrey G. Paine and Michael A. Cardoza},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/70135877},
  note = {Source identifier: 70135877}
}