ስዕል:Rareearthoxides.jpg

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English: These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding. Clockwise from top center: praseodymium, cerium, lanthanum, neodymium, samarium, and gadolinium.
ምንጭ http://www.ars.usda.gov/is/graphics/photos/jun05/d115-1.htm
አቅራቢው Peggy Greb, US department of agriculture

የፈቃድ አይነት፦

Public domain This image is in the public domain because it contains materials that originally came from the Agricultural Research Service, the research agency of the United States Department of Agriculture.

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The original description page was here. All following user names refer to en.wikipedia.
  • 2009-06-27 10:49 Materialscientist 640×416× (175375 bytes) {{Information |Description = These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding. Clockwise from top center: praseodymium, cerium, lanthanum, neodymium, samarium, and gadolinium. |Source = http://ww

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ያሁኑኑ11:38, 25 ኤፕሪል 2015በ11:38, 25 ኤፕሪል 2015 የነበረው ዕትም ናሙና1,200 × 780 (573 KB)Materialscientistresolution
04:55, 1 ጁን 2010በ04:55, 1 ጁን 2010 የነበረው ዕትም ናሙና640 × 416 (171 KB)HarDNox{{Information |Description={{en|These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding. Clockwise from top center: praseodymium, cerium, lanthanum, neodymium, samarium, and gadolinium.<br/> [[:en:Category:lanthanid

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