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Über die Entwicklungsgeschichte der gegenwärtigen phanerogamen Flora und Pflanzendecke der skandinavischen Halbinsel und der benachbarten schwedischen und norwegischen Inseln - Schulz, August, 1862 -1922 (E. Schweizerbart, 1900)

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The various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (J. Murray, 1904)

Various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (Appleton, 1892)

The various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (J. Murray, 1899)

The various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (John Murray, 1890)

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Die Vegetation der Erde :Sammlung pflanzengeographischer Monographien - Engler, Adolf, 1844 -1930 (W. Engelmann, 1902)

Die Vegetation der Erde :Sammlung pflanzengeographischer Monographien - Engler, Adolf, 1844 -1930 (W. Engelmann, 1908)

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The vegetation of Europe, its conditions and causes - Henfrey, Arthur, 1819 -1859 (J. Van Voorst, 1852)

Vegetation of the Peak District - Moss, Charles Edward, 1872 -1930 (University Press, 1913)

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Die Vegetations-Verhältnisse der Jura- und Keuperformation in den Flussgebieten der Wörnitz und Altmühl. Mit einer geognostisch-topographischen Karte des Bezirkes - Schnizlein, Adalbert, 1814 -1868 (C.H. Beck, 1848)

Die Vegetationsverhältnisse der illyrischen Länder, begreifend Südkroatien, die Quarnero-Inseln, Dalmation, Bosnien und die Hercegovina, Montenegro, Nordalbanien, den Sandzak Novipazar und Serbien - Beck-Mannagetta, G. (Günther), 1856 -1931 (W. Engelmann, 1901)