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Würzburg: Universität Würzburg, 2016
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Wallingford; Boston, MA: CABI, [2020]
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Algerien, 1883/1929
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Adrar, 1882/1905
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Wallingford: CABI, 2004
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Elsevier BV, 1992
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Springer Science and Business Media LLC, 1987
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JSTOR, 1930
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The Royal Geographical Society, 1930
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PERSEE Program, 1991
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American Geophysical Union (AGU), 2018
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American Geophysical Union (AGU), 2017