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*http://imagine.gsfc.nasa.gov/docs/dict_ei.html
 
== ExternalPranala linksluar ==
* [http://www.science.co.il/PTelements.asp?s=Earth List of elements in order of abundance in the Earth's crust] (only correct for the twenty most common elements)
* [http://web.archive.org/web/20060901133923/http://www.astro.wesleyan.edu/~bill/courses/astr231/wes_only/element_abundances.pdf Cosmic abundance of the elements and nucleosynthesis]
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