%O Book %T Worldwide Open Proficiency Test for X Ray Fluorescence Laboratories PTXRFIAEA09: Determination of Major, Minor and Trace Elements in a River Clay %A %U http://www.dgdingfa.net/publications/10685/worldwide-open-proficiency-test-for-x-ray-fluorescence-laboratories-ptxrfiaea09-determination-of-major-minor-and-trace-elements-in-a-river-clay %D 2014 %I INTERNATIONAL ATOMIC ENERGY AGENCY %C Vienna