Platina: Perbedaan antara revisi

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{{Commons|Platinum}}
* [http://www.platinummetalsreview.com/jmpgm/index.jsp The Platinum Group Metals Database]
* [http://wwwelements.vanderkrogt.net/elements/elem/ptelement.htmlphp?sym=Pt A balanced historical account of the sequence of discoveries of platinum; illustrated.]
* [http://www.webelements.com/webelements/elements/text/Pt/index.html WebElements.com - Platinum]
* [http://www.platinummetalsreview.com/ Platinum Metals Review E-Journal]