@misc{indiciae18384dc1ce02,
  title = {Algorithms used in the Airborne Lidar Processing System (ALPS)},
  author = {David B. Nagle and C. Wayne Wright},
  year = {2016},
  doi = {10.3133/ofr20161046},
  url = {https://pubs.usgs.gov/publication/ofr20161046},
  note = {Source identifier: ofr20161046}
}