Тло — разлика између измена
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Ред 142:
* Certini, G., Scalenghe, R. 2006. Soils: Basic concepts and future challenges. Cambridge Univ Press, Cambridge UK.
* [[David R. Montgomery]], ''Dirt: The Erosion of Civilizations'',. ISBN 978-0-520-25806-8
* Faulkner, Edward H
* [http://www.landis.org.uk/soilscapes/ LandIS Free Soilscapes Viewer] Free interactive viewer for the Soils of England and Wales
* Jenny, Hans. 1941. [http://www.soilandhealth.org/01aglibrary/010159.Jenny.pdf Factors of Soil Formation: A System of Quantitative Pedology]
* Logan, W. B
* Mann, Charles C. September 2008. " Our good earth" [[National Geographic Magazine]]
* {{cite web|url=http://www.mvm.usace.army.mil/Readiness/97flood/flood.htm |title=97 Flood |publisher=USGS |accessdate=8. 7. 2008 |deadurl=yes |archiveurl=https://web.archive.org/web/20080624040143/http://www.mvm.usace.army.mil/Readiness/97flood/flood.htm |archivedate=24. 6. 2008 }} Photographs of sand boils.
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