SOIL EROSION
In: African Affairs, Band 43, Heft 170, S. 29-39
ISSN: 1468-2621
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In: African Affairs, Band 43, Heft 170, S. 29-39
ISSN: 1468-2621
A government publication describing the soil conditions of Hidalgo County, Texas in the late 1920's.
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In: International affairs, Band 15, Heft 6, S. 955-956
ISSN: 1468-2346
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In: Journal of the Royal African Society, Band XXXIX, Heft CLV, S. 160-169
ISSN: 1468-2621
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ISSN: 0022-3808
In: Journal of the Royal African Society, Band XXXVII, Heft CXLVII, S. 145-146
ISSN: 1468-2621
In: Journal of the Royal African Society, Band XXXVI, Heft CXLIV, S. 357-370
ISSN: 1468-2621
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ISSN: 1537-534X
In: Current History, Band 23, Heft 2, S. 248-250
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In: Journal of the Royal African Society, Band XXXVII, Heft CXLVI, S. 144-144
ISSN: 1468-2621
In: International labour review, Band 10, S. 825-836
ISSN: 0020-7780
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ISSN: 0276-1742