@misc{indiciae18d20a3fbdbf,
  title = {Platinum concentrations in ferromanganese seamount crusts from the Central Pacific},
  author = {P. Halbach and D. Puteanus and F.T. Manheim},
  year = {1984},
  doi = {10.1007/bf01189182},
  url = {https://pubs.usgs.gov/publication/70013904},
  note = {Source identifier: 70013904}
}