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Pretorius W., Weis D., Williams G., Hanano D., Kieffer B., Scoates J.S. Complete Trace Elemental Characterization of Granitoid (USGS G-2, USGS GSP-2) Reference Materials by High Resolution Inductively Coupled Plasma-Mass Spectrometry. Geostandards and Geoanalytical Research, 30, 39-54, 2006.
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