@book{ international1975iaea, title={IAEA Safeguards Technical Manual Part E: Methods and Techniques}, series={TECDOC Series}, number={174}, year={1975}, url={http://www.dgdingfa.net/publications/420/iaea-safeguards-technical-manual-part-e-methods-and-techniques}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }