Kelimpahan unsur dalam kerak Bumi: Perbedaan antara revisi

!Produksi (2012, [[Ton]])<ref>[http://minerals.usgs.gov/minerals/pubs/commodity/ Commodity Statistics and Information]. USGS. All production numbers are for mines, except for Al, Cd, Fe, Ge, In, N, Se (plants, refineries), S (all forms) and As, Br, Mg, Si (unspecified). Data for B, K, Ti, Y are given not for the pure element but for the most common oxide, data for Na and Cl are for NaCl. For many elements like Si, Al, data are ambiguos (many forms produced) and are taken for the pure element. U data is pure element required for consumption by current reactor fleet [http://www.world-nuclear.org/info/Facts-and-Figures/World-Nuclear-Power-Reactors-and-Uranium-Requirements/] {{Webarchive|url=https://web.archive.org/web/20171001013037/https://minerals.usgs.gov/minerals/pubs/commodity/ WNA|date=2017-10-01 }}. WNA.</ref>

* BookRags, [http://www.bookrags.com/periodictable/ Periodic Table] {{Webarchive|url=https://web.archive.org/web/20090303165806/http://www.bookrags.com/periodictable/ |date=2009-03-03 }}.