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1
Soil conservation /
by Hudson, Norman.
Published 1971
Book
2
Land evaluation for land-use planning and conservation in sloping areas : International Workshop, Enschede, the Netherlands, 17-21 December 1984 /
Published 1986
Book
3
Quantitative and numerical methods in soil classification and survey /
by Webster, R.
Published 1977
Book
4
Suelos y fertilización /
Published 1990
Book
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