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Lehrbuch der vergleichenden mikroskopischen Anatomie der Wirbeltiere - Oppel, Albert, 1863 -1915 (Fischer, 1896)

Lehrbuch der Zoologie für Studierende und Lehrer - Boas, J. E. V. (Johan Erik Vesti), 1855 -1935 (G. Fischer, 1890)

Lehrbuch der Zoologie - Claus, Carl, 1835 -1899 (Elwert, 1897)

Lehrbuch der zoologie - Claus, Carl, 1835 -1899 (N. G. Elwert, 1883)

Lehrbuch der zoologie - Claus, Carl, 1835 -1899 (N. G. Elwert, 1891)

Lehrbuch der zoologie - Voigt, F. S. (Friedrich Siegmund), 1781 -1850 (E. Schweizerbart, 1838)

Lehrbuch der Zootomie; anatomische Charakteristik der Thierklassen, als Einleitung in das Studium der Zoologie, vergleichenden Anatomie und Physiologie mit Hinweisung auf die Icones zootomicae - Frey, Heinrich, 1822 -1890 (Voss, 1843)

Leitfaden zum Bestimmen der Vögel Mittel-Europas, ihrer Jugendkleider und ihrer Nester, nach leicht und sicher erkennbaren Merkmalen - Dahl, Friedrich, 1856 -1929 (Verlag von Gebrüder Borntraeger, 1912)

Levensschets van Herman Schlegel - Schlegel, G. (Gustave), 1840 -1903 (Müller, 1884)

Liberia - Stapf, O. (Otto) 1857 -1933 (Hutchinson, 1906)

Lichtenstein's Catalogus rerum naturalium rarissimarum - Godman, Frederick Du Cane, 1834 -1919 ([Printed by Taylor and Francis], 1882)

The life and letters of Gilbert White of Selborne - White, Gilbert, 1720 -1793 (J. Murray, 1901)

Life of a Scotch naturalist: Thomas Edward, associate of the Linnaean Society - Smiles, Samuel, 1812 -1904 (Harper & brothers, 1876)

Life of a Scotch naturalist, Thomas Edward, associate of the Linnean Society - Smiles, Samuel, 1812 -1904 (John Murray, 1877)

Life of a Scotch naturalist, Thomas Edward, associate of the Linnean Society - Smiles, Samuel, 1812 -1904 (J. Murray, 1877)

The life of vertebrates - Young, J. Z. (John Zachary), 1907 -1997 (Oxford University Press, 1962)

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A List of British birds - British Ornithologists' Union (British Ornithologists' Union, 1915)

A List of British birds - British Ornithologists' Union (John Van Voorst, 1883)

A list of British birds - British Ornithologists' Union (British ornithologists' union, 1915)

A list of British birds - British Ornithologists' Union (J. van Voorst, 1883)

A list of British birds, with, as an appendix, the "Graduates list" for labelling eggs - Marsden, Herbert W. (1881)

A list of European birds, including all species found in the western palaearctic region - Dresser, H. E. (Henry Eeles), 1838 -1915 (The Author, 1881)

List of New Guinea birds : a systematic and faunal list of the birds of New Guinea and adjacent islands - Mayr, Ernst, 1904 -2005 (American Museum of Natural History, 1941)

A list of the birds and mammals collected by the Steere Expedition to the Philippines : with localities, and with brief preliminary descriptions of supposed new species - Steere, Joseph Beal, 1842 -1940 (Courier Office, Printers, 1890)

A list of the birds known to inhabit the Island of Celebes - Tweeddale, Arthur Hay,‏ ‎ Marquis of, 1824 -1878 (1872)

A list of the birds of Australia - Hull, A. F. Basset, Arthur Francis Basset 1862 -1945 (F. Cunninghame for A. Basset Hull, 1909)

A list of the birds of Australia : containing the names and synonyms connected with each genus, species, and subspecies of birds found in Australia, at present known to the author - Mathews, Gregory Macalister Gregory Macalister 1876 -1949 (Witherby, 1913)

List of the birds of India - Hume, Allan Octavian, 1829 -1912 (1879)

A list of the genera of birds : with their synonyma and an indication of the typical species of each genus - Gray, George Robert, 1808 -1872 (Printed and sold by R. and J.E. Taylor, 1841)

A list of the genera of birds : with their synonyma an indication of the typical species of each genus - Gray, George Robert, 1808 -1872 (R. and J.E. Taylor, 1840)

A list of the insectivorous birds of New South Wales / by Alfred J. North - North, Alfred J. (Alfred John), 1855 -1917 (Charles Potter [etc.], Govt. Printer, 1896)

List of the osteological specimens in the collection of the British Museum - British Museum (Natural History) (1847)

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List of the specimens of lepidopterous insects in the collection of the British Museum - Gray, John Edward 1800 -1875 (Printed by order of the Trustees, 1859)

List of the specimens of lepidopterous insects in the collection of the British Museum - Gray, John Edward 1800 -1875 (Printed by order of the Trustees, 1862)

List of the specimens of British animals in the collection of the British Museum - Gray, John Edward 1800 -1875 (Printed by order of the Trustees, 1850)

List of the specimens of British animals in the collection of the British Museum - Gray, John Edward 1800 -1875 (Printed by order of the Trustees, 1852)

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Le livre des orchidées - Kerchove de Denterghem, Oswald, comte de, 1844 -1906 (Hoste, 1894)

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M. Th. Brünnichii Zoologiae fundamenta praelectionibus academicis accommodata = Grunde i dyrelaeren - Brünnich, M. Thr. (Morten Thrane), 1737 -1827 (Apud Frider. Christ. Pelt, 1772)

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Magazine of natural history and journal of zoology, botany, mineralogy, geology and meteorology - Loudon, J. C. (John Claudius), 1783 -1843 (printed for Longman, Rees, Orme, Brown, and Green, 1833)

Magazine of natural history and journal of zoology, botany, mineralogy, geology and meteorology - Loudon, J. C. (John Claudius), 1783 -1843 (printed for Longman, Rees, Orme, Brown, and Green, 1834)

Magazine of natural history and journal of zoology, botany, mineralogy, geology and meteorology - Loudon, J. C. (John Claudius), 1783 -1843 (printed for Longman, Rees, Orme, Brown, and Green, 1837)

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Magyarország Madarai; hazai madárvilág megismerésének vezérfonala - Madarász, Gyula, 1858 -1931 (1899)

Magyarország madarai különös tekintettel gazdasági jelentöségökre. Irta Chernelházi Chernel István. Képekkel ellátta Nécsey István. Intézte Herman Ottó - Herman, Ottó, 1835 -1914 (1899)

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Malimbus : journal of the West African Ornithological Society - West African Ornithological Society. (Ahmadu Bello University Press, 1982)

Malimbus : journal of the West African Ornithological Society - West African Ornithological Society. (Ahmadu Bello University Press, 1983)