@book{
international1970iaea,
title={Isotope Techniques for Studying Animal Protein Production from Non-protein Nitrogen},
series={Technical Reports Series},
number={111},
year={1970},
isbn={92-0-115470-4},
url={http://www.dgdingfa.net/publications/1210/isotope-techniques-for-studying-animal-protein-production-from-non-protein-nitrogen},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}