@book{ international1967iaea, title={Isotope Studies on the Nitrogen Chain (Vienna, 28 Aug.- 1 Sep. 1967)}, series={Proceedings Series}, year={1967}, isbn={92-0-010068-6}, url={http://www.dgdingfa.net/publications/2119/isotope-studies-on-the-nitrogen-chain-vienna-28-aug-1-sep-1967}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }