@misc{indiciae0a4afc1c20cf,
  title = {Mediterranean seabed in digital shaded relief},
  author = {Robert K. Mark and Richard J. Pike and Giovanni Bortoluzzi and Marco Ligi},
  year = {2006},
  doi = {10.1029/90eo00215},
  url = {https://pubs.usgs.gov/publication/70242860},
  note = {Source identifier: 70242860}
}