@book{
international2009iaea,
title={Worldwide Proficiency Test for X Ray Fluorescence Laboratories PTXRFIAEA/05 Determination of Minor and Trace Elements in Marine Sediment},
series={Analytical Quality in Nuclear Applications Series},
number={5},
year={2009},
url={http://www.dgdingfa.net/publications/8146/worldwide-proficiency-test-for-x-ray-fluorescence-laboratories-ptxrfiaea05-determination-of-minor-and-trace-elements-in-marine-sediment},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}