@book{ international2017iaea, title={X Ray Fluorescence in the IAEA and its Member States Newsletter No. 27}, series={XRF Newsletter}, number={27}, year={2017}, url={http://www.dgdingfa.net/publications/12234/x-ray-fluorescence-in-the-iaea-and-its-member-states-newsletter-no-27}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }