@book{
international2007iaea,
title={Management Practices for Improving Sustainable Crop Production in Tropical Acid Soils},
series={Proceedings Series (CD-ROM)},
year={2007},
isbn={978-92-0-155007-1},
url={http://www.dgdingfa.net/publications/7720/management-practices-for-improving-sustainable-crop-production-in-tropical-acid-soils},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}