@misc{indiciae2ca8dcf8ffb8,
  title = {Executive summary},
  author = {Leslie F. Ruppert and Robert T. Ryder},
  year = {2014},
  doi = {10.3133/pp1708a.1},
  url = {https://pubs.usgs.gov/publication/pp1708A.1},
  note = {Source identifier: pp1708A.1}
}