Litteratur |
Bibliography of the Metals of the Platinum Group: Platinum,
Palladium, Iridium, Rhodium, Osmium .... / : James Lewis Howe,
1897.
- https://archive.org/details/bibliographymet00howegoog
Technological alternatives for the conservation of strategic and
critical minerals--cobalt, chromium, manganese, and platinum-group
metals : a review. / : Russell J Foster. United States. Bureau
of Mines, 1985.
- https://archive.org/details/technologicalalt00fost