Keys to Polish Soil Classification (6th ed., 2019) - interactive keys and pictures (Prof. C. Kabała, UPWr)
Polish Soil Classification (6th edition, 2019) - oficial printed version
ENGLISH Introduction to Polish Soil Classification and correlations with international systems (paper in the Soil Science Annual)
Classification of particle-size distribution, Soil Science Society of POland, 2008/2009 (oficial version, Soil Science Annual)
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International Soil Classifications
World Reference Base for Soil Resources (2014/2015)
US Keys to Soil Taxonomy (2014)
