• Agriculture - Soils - Soil Morphology, Classification And Survey
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USA: NRCS Soils Data Mart
USA: Soil Survey Information for Massachusetts and New England
USA: The Soils of Pennsylvania
USA: The Twelve Soil Orders
World Reference Base for soil resources (2006, 2nd ed.)
World Reference Base, Map of World Soil Resources
National Soil Maps (European Digital Archive of Soil Maps)
World: GlobalSoilMap
World: Lecture notes on the major soils of the world
A Compendium of On-Line Soil Survey Information
 
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