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Soils and soil fertility
McGraw-Hill, 1978
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World soil resources and food security
editor, Rattan Lal, B.A. Stewart
CRC Press, 2012
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Sulman, Elizabeth
Introduction to soil
Prentice-Hall, 1999
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Interactive soil mechanics and foundations
John Wiley & Sons, 2007
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Characteristics of composted bio-toilet residue and its potential use as a soil conditioner
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