%O Book %T Worldwide Proficiency Test: Determination of Minor and Trace Elements in Grass Mixture IAEA-PTXF-06 %A %U http://www.dgdingfa.net/publications/8487/worldwide-proficiency-test-determination-of-minor-and-trace-elements-in-grass-mixture-iaea-ptxf-06 %D 2011 %I INTERNATIONAL ATOMIC ENERGY AGENCY %C Vienna
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