@book{
international2014iaea,
title={Worldwide Open Proficiency Test for X ray Fluorescence Laboratories PTXRFIAE08: Determination of Minor and Trace Elements in Natural Soil},
series={Analytical Quality in Nuclear Applications Series},
number={38},
year={2014},
url={http://www.dgdingfa.net/publications/10686/worldwide-open-proficiency-test-for-x-ray-fluorescence-laboratories-ptxrfiae08-determination-of-minor-and-trace-elements-in-natural-soil},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}