@book{ international2000iaea, title={Management and Conservation of Tropical Acid Soils for Sustainable Crop Production}, series={TECDOC Series}, number={1159}, year={2000}, url={http://www.dgdingfa.net/publications/6036/management-and-conservation-of-tropical-acid-soils-for-sustainable-crop-production}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }
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