@misc{indiciae7b4ed31330a5,
  title = {World subsea mineral resources},
  author = {V.E. McKelvey and F.F.H. Wang},
  year = {1969},
  doi = {10.3133/i632},
  url = {https://pubs.usgs.gov/publication/i632},
  note = {Source identifier: i632}
}