@misc{indiciaed6dd5be0d8bc,
  title = {Annotated bibliography},
  author = {Robert H. Armstrong and Mary F. Willson and Martin D. Robards and John F. Piatt},
  year = {1999},
  url = {https://pubs.usgs.gov/publication/2002023},
  note = {Source identifier: 2002023}
}