Bibliografia

FAO, (1976) A framework for Land Evaluation. FAO Soils Bulletin 32, FAO, Rome null
FAO, (2001) Lecture Notes on the Major Soils of the World. World Soil Resources Reports 94, FAO, Rome null
Buol, S.W., Hole, F.D., Mc Cracken, R.J., Southard, R.J. (1997) Soil Genesis and Classification (4th ed). Iowa State University Press, Ames. (Capítulos 2 - 6). null
IUSS Working Group WRB, (2006) World Reference Base for Soil Resources. World Soil Resources Reports 103, FAO, Rome null
Brady, N. C. & Weil, R.R. (2008) The Nature and Properties of Soil (14th edition revised). Pearson International Edition. Pearson Education, Inc., Upper Saddle River, New Jersey. (Os mesmos capítulos da edição anterior) null

Sanchez, P. (1976) Properties and Management of Soils in the Tropics. John Wiley & Sons, New York. null
Soil Survey Staff (2006) Keys to Soil Taxonomy (10th Ed). USDA/NCRS, Washington. null
EEA, (2000) Down to earth: Soil degradation and sustainable development in Europe - A challenge for the 21st century. Environmental issue report No 16. null
Sanchez, P.A. & Lal, R. (1992) Myths and Science of Soils of the Tropics, SSSA, Special Publication, no. 29. Madison. null
European Environment Agency, (2003) Europe’s environment: the third assessment. Environmental assessment report, 10. (Chap. 9: Soil Degradation) null