@book{ international1963iaea, title={Radioisotopes in Hydrology (Tokyo, 5-9 March 1963)}, series={Proceedings Series}, year={1963}, isbn={92-0-040063-9}, url={http://www.dgdingfa.net/publications/2007/radioisotopes-in-hydrology-tokyo-5-9-march-1963}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }