@misc{indiciae25c0bfb6437a,
  title = {International Polar Year (IPY), 2007-2008},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2007},
  doi = {10.3133/gip50},
  url = {https://pubs.usgs.gov/publication/gip50},
  note = {Source identifier: gip50}
}