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[15] EN 13925 – 2: 2003 , Non-destructive testing – X- ray diffraction from polycrystalline and amorphous materials – part 2 : Procedures

[16] ISO 29301: 2010 , Microbeam analysis – Analytical transmission electron microscopy – M ethods for calibrating image magnification by using reference materials having periodic structures

[17] ISO/TR 27628: 2007 , Workplace atmospheres – Ultrafine , nanoparticle and nano – structured aerosols – Inhalation exposure characterization and assessment

[18] EN 13925 -3 : 2005 , Non – destructive testing – X-ray diffraction from polycrystalline and amorphous materials – part 3 : instruments