@book{
international2002iaea,
title={Assessment of Soil Phosphorus Status and Management of Phosphatic Fertilisers to Optimise Crop Production},
series={TECDOC Series (CD-ROM)},
number={1272},
year={2002},
url={http://www.dgdingfa.net/publications/6443/assessment-of-soil-phosphorus-status-and-management-of-phosphatic-fertilisers-to-optimise-crop-production},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}