European Committee for Standardization Technical Specification CEN/TS 17216 2018 : construction products : assessment of release of dangerous substances : determination of activity concentrations of radium-226, thorium-232 and potassium-40 in construction products using semiconductor gamma-ray spectrometry / European Committee for StandardizationBrussels : CEN, 201842 p..
Ref. No. CEN/TS 17216:2018 E.
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