Katalog der Eiersammlung : nebst Beschreibungen der aussereuropäischen Eier - Nehrkorn, Adolph (H. Bruhn, 1899)

The keeper : AAZK bulletin - American Association of Zoo Keepers. San Diego Chapter. (American Association of Zoo Keepers, 1973)

Die Kennzeichen der Vögel Deutschlands; Schlüssel zum bestimmen, deutsche und wissenschaftliche Benennungen, geographische Verbreitung, Brut- und Zugzeiten der deutschen Vögel - Reichenow, Anton, 1847 -1941 (J. Neumann, 1920)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 1940)

The Kentucky warbler - Kentucky Ornithological Society. (Kentucky Ornithological Society, 1961)

Key to North American birds; containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary. Illustrated by 6 steel plates and upwards of 250 woodcuts - Coues, Elliott, 1842 -1899 (Naturalists' Agency, 1872)

Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds - Coues, Elliott, 1842 -1899 (Estes and Lauriat, 1890)

Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland - Coues, Elliott, 1842 -1899 (Macmillan, 1884)

Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds - Coues, Elliott, 1842 -1899 (Estes and Lauriat, 1887)

Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California, with which are incorporated General ornithology, an outline of the structure and classification of birds, and Field ornithology, a manual of collecting, preparing, and preserving birds - Coues, Elliott, 1842 -1899 (D. Estes and Company, 1890)

Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds - Coues, Elliott, 1842 -1899 (Estes and Lauriat, 1894)

Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds - Coues, Elliott, 1842 -1899 (Estes and Lauriat, 1896)

Key to North American birds containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland - Coues, Elliott, 1842 -1899 (Estes and Lauriat, 1884)

A key to the birds of the Hawaiian group - Bryan, William Alanson, 1875 -1942 (Bishop Museum Press, 1901)

A key to the birds of the lower Yangtse Valley, with popular descriptions of the species commonly seen - Gee, Nathaniel Gist, 1876 -1937 (Shanghai Mercury Limited, Print, 1917)

Kidd's own journal - Kidd, William, 1803 -1867 (William Spooner, 1853)

Kingsclere - Porter, John, 1838 - (Chatto & Windus, Piccadilly, 1896)

Kirtlandia - Cleveland Museum of Natural History (Cleveland Museum of Natural History, 2007)

Kloof and karroo: Sport, legend and natural history in Cape Colony, with a notice of the game birds, and of the present distribution of antelopes and larger game - Bryden, H. A. (Henry Anderson), 1854 -1937 (Longmans, Green and co, 1889)

Kloof and karroo: Sport, legend and natural history in Cape Colony, with a notice of the game birds, and of the present distribution of the antelopes and larger game - Bryden, H. A. (Henry Anderson), 1854 -1937 (Longmans, Green and co, 1889)

Knowledge. v. 1-40; Nov. 1881-Dec. 1917 (Wyman [etc.])

Det Kongelige Danske videnskabernes selskabs skrifter. Naturvidenskabelig og mathematisk afdeling - Kongelige Danske videnskabernes selskab. (1918)

Kosmos (Ernst Günther, 1877)

Kosmos (Ernst Günther, 1886)

Kritische Übersicht der europäischen Vögel. Revue critique des oiseaux d'Europe - Schlegel, H. (Hermann), 1804 -1884 (Arnz, 1844)

Kritisk framställning af fogelarterna uti äldre ornithologiska arbeten - Sundevall, Carl J., 1801 -1875 (s.n, 1857)

Kulturpflanzen und Hausthiere in ihrem Übergang aus Asien nach Griechenland und Italien sowie in das übrige Europa; historisch-linguistische Skizzen - Engler, Adolf, 1844 -1930 (Gebrüder Borntraeger, 1902)

Kungl. Svenska vetenskapsakademiens handlingar - Kungl. Svenska vetenskapsakademien. (L.L. Grefing, 1835)

Kungl. Svenska vetenskapsakademiens handlingar - Kungl. Svenska vetenskapsakademien. (L.L. Grefing, 1857)

Kungl. Svenska vetenskapsakademiens handlingar - Kungl. Svenska vetenskapsakademien. (L.L. Grefing, 1861)

Kungl. Svenska vetenskapsakademiens handlingar - Kungl. Svenska vetenskapsakademien. (L.L. Grefing, 1911)

Kungl. Svenska vetenskapsakademiens handlingar - Kungl. Svenska vetenskapsakademien. (L.L. Grefing, 1913)

Kungliga Svenska vetenskapsakademiens årsbok - Kungl. Svenska vetenskapsakademien. (Almqvist ' Wiksells Boktr, 1910)

Laboratory manual of general physiology - Barnes, T. Cunliffe (Thomas Cunliffe), 1904 - (P. Blakiston's son & co, 1937)

Laboratory technique in biology and medicine - Cowdry, E. V. (Edmund Vincent), 1888 -1975 (Williams & Wilkins Co, 1948)

Laboratory technique in biology and medicine - Cowdry, E. V. (Edmund Vincent), 1888 -1975 (Williams & Wilkins, 1952)

Lake Maxinkuckee : a physical and biological survey - Evermann, Barton Warren, 1853 -1932 (Dept. of Conservation, 1920)

Lake Maxinkuckee. a physical and biological survey - Evermann, Barton Warren, 1853 -1932 (Wm. B. Burford, printer], 1920)

Lake Umbagog journals, 1871-1916 (inclusive) - Brewster, William, 1851 -1919 (1871)

Land and sea birds nesting within the Arctic Circle in the lower Mackenzie River district - Historical; Scientific Society of Manitoba. (s.n.], 1890)

The land-birds and game-birds of New England; with descriptions of the birds, their nests and eggs, their habits and notes, with illustrations - Minot, H. D. (Henry Davis), 1859 -1890 (Houghton, Mifflin, 1895)

The land-birds and game-birds of New England with descriptions of the birds, their nests and eggs, their habits and notes - Brewster, William, 1851 -1919 (Houghton, Mifflin, 1903)

The land birds in and around St. Andrews : including a condensed history of the British land birds, with extracts from the poets and observations and anecdotes on natural history - Bruce, George. (John Leng & Co, 1895)

Land birds of the Pacific district - Belding, Lyman, 1829 -1917 (California Academy of Sciences, 1890)

Larva collecting and breeding : a handbook to the larvae of the British Macro-Lepidoptera and their food plants : both in nature and in confinement, with authorities - St. John, John Seymour. (W. Wesley, 1890)

Latreille's Naturliche Familien des Thierreichs - Latreille, P. A. (Pierre André), 1762 -1833 (Im Verlage des Gr. H.S. priv. Landes-Industrie- Comptoirs, 1827)

The law of horses, including the law of innkeepers, veterinary surgeons, &c - Lloyd, Clement Elphinstone, 1851 - (Sweet & Maxwell, 1896)

The law of horses : including the law of innkeepers, veterinary surgeons, etc. ... - Great Britain. (Henry Sweet, 1882)

Leach's Systematic catalogue of the specimens of the indigenous mammalia and birds in the British Museum - Salvin, Osbert, 1835 -1898 ([Printed by R. and A. Taylor], 1882)

Lebensbilder aus der Tierwelt - Meerwarth, Hermann, 1870 - (Voigtländer, 1908)

Leçons élémentaires sur l'histoire naturelle des oiseaux - Chenu, Jean-Charles, 1808 -1879 (L. Hachette et cie, 1862)

Lehrbuch der anatomie des menschen, mit rücksicht auf physiologische begründung und praktische anwendung - Hyrtl, Joseph, 1811 -1894 (1889)

Lehrbuch der Forstwirtschaft für Waldbau-und Försterschulen, sowie zum ersten forstlichen unterrichte für Aspiranten des Forstverwaltungsdienstes - Eckert, Karl, (W. Frick, 1908)

Lehrbuch der gartenkunst : oder Lehr von der Anlage Ausschmückung und Künstlerischen unterhalung der Gärten und freien Anlagen - Jäger, H. (Hermann), 1815 -1890 (Hugo Voigt, 1877)

Lehrbuch der Naturgeschichte - Burmeister, Hermann, 1807 -1892 (Anton und Gelbecke, 1830)

Lehrbuch der Naturgeschichte - Perleb, Karl Julius, 1794 -1845 (Friedrich Wagner, 1831)

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

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)

Leisure-time studies chiefly biological; a series of essays and lectures - Wilson, Andrew, 1852 -1912 (Chatto and Windus, 1884)

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)

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)

Leopoldina - Kaiserlich Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher (E. Blochmann & Sohn, 1886)

Leopoldina - Kaiserlich Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher (E. Blochmann & Sohn, 1899)

Letters on natural magic - Brewster, David, Sir, 1781 -1868 (Chatto, 1883)

Letters to Marco - Leslie, George Dunlop, 1835 -1921 (Macmillan and co, 1893)

Licensing and registration under the Animal Welfare Act : guidelines for dealers, exhibitors, transporters, and researchers - United States. Animal; Plant Health Inspection Service. (U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service, 1997)

Life and evolution - Headley, F. W. (Frederick Webb), 1856 -1919 (Duckworth, 1906)

Life and letters of Alexander Goodman More, F.R.S.E., F.L.S., M.R.I.A., with selections from his zoological and botanical writings - More, Alexander Goodman, 1830 -1895 (Hodges, Figgis & co. (ltd.), 1898)

Life and letters of Alexander Goodman More, with selections from his zoological and botanical writings - More, Alexander Goodman, 1830 -1895 (Hodges, Figgis, 1898)

Life and letters of Thomas Henry Huxley - Huxley, Thomas Henry, 1825 -1895 (D. Appleton and company, 1900)

Life and letters of Thomas Henry Huxley - Huxley, Leonard, 1860 -1933 (Macmillan, 1900)

Life and letters of Thomas Henry Huxley - Huxley, Thomas Henry, 1825 -1895 (D. Appleton and Co, 1900)

Life and letters of Thomas Henry Huxley - Huxley, Leonard, 1860 -1933 (Macmillan & Co, 1908)

Life and letters of Thomas Henry Huxley - Huxley, Thomas Henry, 1825 -1895 (Macmillan, 1903)

The life and times of Henry Lord Brougham - Brougham; Vaux, Henry Brougham, Baron, 1778 -1868 (W. Blackwood, 1871)

Life and times of "the Druid" (Henry Hall Dixon) - Lawley, Francis Charles. (Vinton & Co, 1895)

Life histories of North American birds : with special reference to their breeding habits and eggs - Bendire, Charles, 1836 -1897 (Smithsonian Institution, 1892)

Life histories of North American birds with special reference to their breeding habits and eggs, with twelve lithographic plates - Bendire, Charles, 1836 -1897 (Govt. print. off, 1892)

Life history album - Galton, Francis, Sir, 1822 -1911 (Macmillan, 1884)

Life of Alexander von Humboldt compiled in commemoration of the centenary of his birth - Avé-Lallemant, Robert, 1812 -1884 (Longmans, Green, 1873)

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

Life of Frank Buckland - Bompas, George C. (Smith, Elder, & Co, 1886)

The life of James Clerk Maxwell : with a selection from his correspondence and occasional writings and a sketch of his contributions to science - Campbell, Lewis, 1830 -1908 (Macmillan, 1882)

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

The life of the fields - Jefferies, Richard, 1848 -1887 (Chatto and Windus, 1884)

Light and the behavior of organisms - Mast, Samuel Ottmar, 1871 -1947 (J. Wiley & Sons; [etc., etc.], 1911)

Light and the behavior of organisms - Mast, Samuel Ottmar, 1871 - (J. Wiley & Sons; [etc., etc.], 1911)

Linnaea : Ein Journal für die Botanik in ihrem ganzen Umfange - Schlechtendal, D. F. L. von (Diedrich Franz Leonhard von), 1794 -1866 (F. Dümmler, 1835)

A List of birds' eggs in the collection of Mr. William Stoate, Wembdon, Bridgewater - Stoate, William. (1880)

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 ... - Ogilvie-Grant, W. R. (William Robert), 1863 -1924 (1910)