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Rome: Food and Agriculture Organization of the United Nations, 2006
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Boca Raton, Fla. [u.a.]: CRC Press, 2003
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Stockholm: Statens Geotekniska Institut, 1968
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London [u.a.]: Earthscan, 2009
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Berlin: Borntraeger, 1914
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Chichester, West Sussex [u.a.]: Wiley-Blackwell, 2011
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Hamburg: Eurailpress, 2004
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Boca Raton, Fla. [u.a.]: Lewis Publ., 2001
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Rome: FAO, 2014
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Hannover: BGR, 2008