@book{
international1986iaea,
title={Gamma, X ray and Neutron Techniques for the Coal Industry},
series={Panel Proceedings Series},
year={1986},
isbn={92-0-161086-6},
url={http://www.dgdingfa.net/publications/3561/gamma-x-ray-and-neutron-techniques-for-the-coal-industry},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}