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References
- ↑ McDonald, Donald; B. Hunt, Leslie (1982). A History of Platinum and its Allied Metals. Johnson Matthey. p. 78. ISBN 0905118839.
- ↑ Le Corbeiller, Clare (1975). Platinum Metals Review . 19 (4): 154–155.
{{cite journal}}: Missing or empty|title=(help) - ↑ "Sugar bowl". The Metropolitan Museum of Art. Retrieved 2016-08-16.
- ↑ McDonald, Donald; B. Hunt, Leslie (1982). A History of Platinum and its Allied Metals. Johnson Matthey. p. 187. ISBN 0905118839.
- ↑ Quinn, Terry (2011). From Artefacts to Atoms. Oxford University Press. ISBN 9780195307863.
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