@misc{indiciaef308412c4514,
  title = {A Century of Retreat at Portage Glacier, South-Central Alaska},
  author = {Ben W. Kennedy and Dennis C. Trabant and Lawrence R. Mayo},
  year = {2006},
  doi = {10.3133/fs20063141},
  url = {https://pubs.usgs.gov/publication/fs20063141},
  note = {Source identifier: fs20063141}
}