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SPECTROSCOPY AND SPECTRAL ANALYSIS  2021, Vol. 41 Issue (03): 696-703    DOI: 10.3964/j.issn.1000-0593(2021)03-0696-08
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Research Progress of Ultra-Fine Reference Materials and Ultra-Fine Samples
WANG Yi-ya, WANG Yi-min*
National Research Center of Geoanalysis, Beijing 100037, China