@misc{indiciaed4a26d3bd4e8,
  title = {Insular and submarine ferromanganese mineralization of the Tonga-Lau region},
  author = {J.R. Hein and M. S. Schulz and Jung-Keuk Kang},
  year = {1990},
  url = {https://pubs.usgs.gov/publication/70015946},
  note = {Source identifier: 70015946}
}