Montserrat, Dominic 21 February 2003 "Astrophysics: Radioactive glow as a smoking gun"
"Understanding gold chemistry through relativity" : CRC Handbook of Chemistry and Physics

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Retrieved on 4 May 2012
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In Sigel, Astrid; Sigel, Helmut; Freisinger, Eva; Sigel, Roland K Journal of Inorganic and General Chemistry
"An immunocolloid method for the electron microscope" Band II, Ferdinand Enke Verlag, Stuttgart 1978,

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8 Kupfer und seine Legierungen.

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Berdan,, Frances; Anawalt, Patricia Rieff 1992 Shannon Venable: Gold: A Cultural Encyclopedia
Its scarcity makes it a useful store of value; however, its relative rarity reduced its utility as a currency, especially for transactions in small denominations Suiting up for space: the evolution of the space suit

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"The tungsten isotopic composition of the Earth's mantle before the terminal bombardment"
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Electrical Contact Catalog Material Catalog