(2006). World reference base for soil resources 2006: A framework for international classification, correlation and communication. Food and agriculture organization of the United Nations.
Chicago-viite (17. p.)World Reference Base for Soil Resources 2006: A Framework for International Classification, Correlation and Communication. Rome: Food and agriculture organization of the United Nations, 2006.
MLA-viite (9. p.)World Reference Base for Soil Resources 2006: A Framework for International Classification, Correlation and Communication. Food and agriculture organization of the United Nations, 2006.
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