@book{
international2003iaea,
title={Neutron and Gamma Probes: Their Use in Agronomy},
series={Training Course Series},
number={16/2},
year={2003},
url={http://www.dgdingfa.net/publications/6804/neutron-and-gamma-probes-their-use-in-agronomy},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}