Richter, D. D. Understanding soil change: Soil sustainability over millennia, centuries, and decades. Cambridge.
Chicago-viite (17. p.)Richter, Daniel D. Understanding Soil Change: Soil Sustainability over Millennia, Centuries, and Decades. c2001: Cambridge.
MLA-viite (9. p.)Richter, Daniel D. Understanding Soil Change: Soil Sustainability over Millennia, Centuries, and Decades. Cambridge.
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