http://resource.geosciml.org/classifier/cgi/commodity-code/thulium
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| definition | Thulium is a chemical element that has the symbol Tm and atomic number 69. It is the thirteenth and antepenultimate element in the lanthanide series | ||||||
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| source | http://en.wikipedia.org/wiki/Thulium | ||||||
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| in scheme | commodity-code original | ||||||