Lehrbuch der vergleichenden Anatomie der wirbellosen Thiere - Siebold, C. Th. E. von (Carl Theodor Ernst), 1804 -1885 (Verlag von Veit & Comp, 1848)

Lehrbuch der vergleichenden Anatomie der Wirbelthiere : auf Grundlage der Entwicklungsgeschichte - Wiedersheim, Robert, 1848 -1923 (G. Fischer, 1883)

Lehrbuch der vergleichenden anatomie der wirbelthiere; auf grundlage der entwicklungsgeschichte - Wiedersheim, Robert, 1848 -1923 (G. Fischer, 1883)

Lehrbuch der Vergleichenden Mikroskopischen Anatomie der Wirbeltiere - Franz, Victor, 1883 -1950 (verlag von Gustav Fischer, 1913)

Lehrbuch der vergleichenden mikroskopischen Anatomie der Wirbeltiere - Royal College of Physicians of Edinburgh. (G. Fischer, 1914)

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

Lehrbuch der Zoologie - Hertwig, Richard Karl Wilhelm Theodor von Sir Richard Karl Wilhelm Theodor von Hertwig 1850 -1937 (G. Fischer, 1893)

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

Lehrbuch der zoologie in populärer darstellung : nach methodischen grundsätzen für gehobene lehranstalten, sowie zum selbstunterrichte - Baenitz, Carl, 1839 - (Adolph Stubenrauch, 1876)

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 - Hertwig, Richard Karl Wilhelm Theodor von Sir Richard Karl Wilhelm Theodor von Hertwig 1850 -1937 (G. Fischer, 1892)

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)

Die Lehre von den Haaren in der gesammten organischen Natur - Eble, Burkard, 1799 -1839 (Heubner, 1831)

Leitfaden für das zoologische Praktikum - Kükenthal, W. G. (Willy Georg), 1861 -1922 (Gustav Fischer, 1910)

Leitfaden für das zoologische Praktikum - Kükenthal, W. G. (Willy Georg), 1861 -1922 (G. Fischer, 1912)

Leitfaden für die Försterprüfungen; ein Handbuch für den Unterricht und Selbstunterricht unter Berücksichtigung der preussischen Verhältnisse sowie für den praktischen Forstwirt - Westermeier, G. (J. Springer, 1909)

Le Léman : monographie limnologique - Forel, F. A. (François Alphonse), 1841 -1912 (F. Rouge, 1904)

Leopoldina - Kaiserlich Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher (E. Blochmann & Sohn, 1881)

Leopoldina - Kaiserlich Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher (E. Blochmann & Sohn, 1882)

Leptarctines from the Florida Miocene (Carnivora, Mustelidae) - Olsen, Stanley John, 1919 - (American Museum of Natural History, 1957)

Lethaea geognostica oder Abbildungen und Beschreibungen der für die Gebirgs-Formationen bezeichnendsten Versteinerungen - Bronn, H. G. (Heinrich Georg), 1800 -1862 (1838)

Lethaea rossica, ou, Paléontologie de la Russie - Eichwald, Carl Eduard von, 1795 -1876 (E. Schweizerbart, 1852)

Letters and recollections of Alexander Agassiz - Agassiz, Alexander, 1835 -1910 (Constable, 1913)

Das Leuchten des Meeres : neue Beobachtungen nebst Übersicht der Hauptmomente der geschichtlichen Entwicklung dieses merkwürdigen Phänomens - Ehrenberg, Christian Gottfried, 1795 -1876 (Gedruckt in der Druckerei der Königlichen Akademie der Wissenschaften, 1835)

Life-histories of northern animals : an account of the mammals of Manitoba - Seton, Ernest Thompson, 1860 -1946 (Scribner, 1909)

Life-histories of northern animals an account of the mammals of Manitoba - Seton, Ernest Thompson, 1860 -1946 (C. Scribner's Sons, 1909)

Life history studies of woodpeckers of eastern North America - Nuttall Ornithological Club. (Nuttall Ornithological Club, 1983)

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

The life of animals; the mammals - Ingersoll, Ernest, 1852 -1946 (The Macmillan Company, 1906)

The life of mammals - Ingersoll, Ernest, 1852 -1946 (Macmillan, 1917)

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

The life of the Pleistocene or glacial period, as recorded in the deposits laid down by the greatice sheets - Baker, Frank Collins, 1867 -1942 (Pub. by the University of Illinois under the auspices of the Graduate School, 1920)

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

Life, outlines of general bioloy - Thomson, J. Arthur (John Arthur), 1861 -1933 (Harper, 1900)

Life zone investigations in Wyoming - United States. Bureau of Biological Survey. (Government Printing Office, 1917)

Life zones and crop zones of New Mexico - Bailey, Vernon, 1864 -1942 (G.P.O, 1913)

The Lincolnshire naturalist : transactions of the Lincolnshire Naturalists' Union - Lincolnshire Naturalists' Union. (Lincolnshire Naturalists' Union, 1999)

The Lincolnshire naturalist : transactions of the Lincolnshire Naturalists' Union - Lincolnshire Naturalists' Union. (Lincolnshire Naturalists' Union, 2003)

The Lincolnshire naturalist : transactions of the Lincolnshire Naturalists' Union - Lincolnshire Naturalists' Union. (Lincolnshire Naturalists' Union, 2008)

The lipids, their chemistry and biochemistry - Deuel, Harry James, 1897 -1956 (Interscience Publishers, 1955)

List of birds collected by Heller in Peru - Heller, Edmund, 1875 -1939 (1914)

List of North American land mammals in the United States National Museum, 1911 - Miller, Gerrit S. Jr. (Gerrit Smith), 1869 -1956 (Govt. print. off, 1912)

List of North American recent mammals 1923 - Miller, Gerrit S. (Gerrit Smith), 1869 -1956 (Govt. Print. Off, 1924)

List of recent land mammals of Mexico, 2014 - Arroyo-Cabrales, Joaquin (Museum of Texas Tech University, 2014)

List of skeletons and crania in the Section of Comparative Anatomy of the United States Army Medical Museum : for use during the International Exhibition of 1876 in connection with the representation of the Medical Department, U.S. Army - Yarrow, H. C. (Harry Crécy) 1840 -1929 (Army Medical Museum, 1876)

List of skeletons and crania in the section of comparative anatomy of the United States Army Medical Museum : for use during the International Exhibition of 1876 in connection with the representation of the Medical Department, U.S., Army - Yarrow, H. C. (Harry Crécy) 1840 -1929 (The Museum, 1876)

List of the animals in the gardens of the Zoological Society : with notices respecting them : May, 1837 - Zoological Society of London. (Printed by Richard and John E. Taylor, 1837)

List of the animals in the gardens of the Zoological Society : with notices respecting them, and a plan of the gardens, showing the buildings and enclosures in which the animals are kept : June 1833 - Zoological Society of London. (Printed by Richard Taylor, 1833)

A list of the birds of New Hampshire - Allen, Glover M. (Glover Morrill), 1879 -1942 (Nature press, 1903)

A list of the birds of New Hampshire - Allen, Glover M. (Glover Morrill), 1879 -1942 (Nature Study press, 1903)

List of the books, memoirs, and miscellaneous papers - Gray, John Edward 1800 -1875 (Printed for private distribution, 1875)

List of the books, memoirs, and miscellaneous papers by Dr. J.E. Gray, F.R.S. : with a few historical notes - Gray, John Edward 1800 -1875 (Printed for private distribution, 1872)

A list of the land and sea mammals of North America north of Mexico. Supplement to the synopsis - Elliot, Daniel Giraud, 1835 -1915 (1901)

A list of the mammals of Manitoba - Seton, Ernest Thompson, 1860 -1946 (s.n.], 1886)

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

List of the specimens of fish in the collection of the British Museum - Gray, John Edward 1800 -1875 (Printed by order of the Trustees, 1851)

List of the specimens of Mammalia in the collection of the British museum - Gray, John Edward 1800 -1875 (The Trustees, 1843)

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, 1851)