@book{
international2002iaea,
title={Neutron and Gamma Probes: Their Use in Agronomy},
series={Training Course Series},
number={16},
year={2002},
url={http://www.dgdingfa.net/publications/6140/neutron-and-gamma-probes-their-use-in-agronomy},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}