Significance of white markings in birds of the order Passeriformes - Tracy, Henry Chester, 1876 - (The University press, 1910)

Silviculture of southwestern ponderosa pine : the status of our knowledge - Schubert, Gilbert Herman, 1915 - (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1974)

Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin - Gesellschaft Naturforschender Freunde zu Berlin. (Gesellschaft Naturforschender Freunde, 1913)

Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe. Abt. 1, Mineralogie, Botanik, Zoologie, Anatomie, Geologie und Paläontologie - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Commission bei Carl Gerold's Sohn, 1863)

Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe. Abt. 1, Mineralogie, Botanik, Zoologie, Geologie und Paläontologie - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Commission bei C. Gerold's Sohn, 1881)

Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe. Abt. 1, Mineralogie, Botanik, Zoologie, Geologie und Paläontologie - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Commission bei C. Gerold's Sohn, 1882)

Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe. Abt. 1, Mineralogie, Botanik, Zoologie, Geologie und Paläontologie - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (K.-K. Hof- und Staatsdruckerei in Commission bei C. Gerold's Sohn, 1885)

Sitzungsberichte der königl. böhmischen Gesellschaft der Wissenschaften in Prag - Königlich-Böhmische Gesellschaft der Wissenschaften (Königlich-böhmische Gesellschaft der Wissenschaften, 1878)

Sitzungsberichte der königl. böhmischen Gesellschaft der Wissenschaften in Prag - Königlich-Böhmische Gesellschaft der Wissenschaften (Königlich-böhmische Gesellschaft der Wissenschaften, 1859)

Sitzungsberichte der Königlich Preussischen Akademie der Wissenschaften zu Berlin - Deutsche Akademie der Wissenschaften zu Berlin. (Deutsche Akademie der Wissenschaften zu Berlin, 1904)

Skandinaviens fugle, med særligt hensyn til Danmark og de nordlige bilande - Grönvold, Henrik, 1858 -1940 (L.A. Jørgensen, 1875)

Sketch-book of British birds - Sharpe, Richard Bowdler, 1847 -1909 (Society for Promoting Christian Knowledge, 1898)

A sketch of Madeira : containing information for the traveller, or invalid visitor - Harcourt, Edward Vernon, 1825 -1891 (John Murray, 1851)

Skizzirte Entwickelungs-Geschichte und natürliches System der europäischen Thierwelt : Erster Theil welcher die Vogelsäugethiere und Vögel nebst Andeutung der Entstehung der letzteren aus Amphibien enthält - Kaup, J. J. (Johann Jacob), 1803 -1873 (In commission bei Carl Wilhelm Leske, 1829)

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Smithsonian contributions to knowledge - Smithsonian Institution (Smithsonian Institution, 1895)

Smithsonian contributions to paleobiology - Smithsonian Institution (Smithsonian Institution Press, 1999)

Smithsonian herpetological information service - Smithsonian Institution (Division of Reptiles and Amphibians, U.S. National Museum, 1986)

Smithsonian herpetological information service - Smithsonian Institution (Division of Reptiles and Amphibians, U.S. National Museum, 1989)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1875)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1882)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1879)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1912)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1916)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1921)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1940)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1954)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1956)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1960)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1964)

Smithsonian year - Smithsonian Institution (Smithsonian Institution, 1965)

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Snake River Birds of Prey Research Project : annual report, 1980 - U.S. Fish; Wildlife Service (U.S. Department of the Interior, Bureau of Land Management, Boise District, 1980)

Snake River Birds of Prey Research Project : annual report, 1981 - U.S. Fish; Wildlife Service (U.S. Department of the Interior, Bureau of Land Management, Boise District, 1981)

Snake River birds of prey research project : annual report, 1984 - U.S. Fish; Wildlife Service (U.S. Department of the Interior, Bureau of Land Management, Boise District, 1984)

Snake River birds of prey research project : annual report, 1986 - U.S. Fish; Wildlife Service (U.S. Department of the Interior, Bureau of Land Management, Boise District, 1986)

Snake River birds of prey research project : annual report, 1985 - U.S. Fish; Wildlife Service (U.S. Department of the Interior, Bureau of Land Management, Boise District, 1985)

Snake River birds of prey research project : annual report, 1983 - U.S. Fish; Wildlife Service (U.S. Department of the Interior, Bureau of Land Management, Boise District, 1983)

Snake River birds of prey research project : annual report, 1982 - U.S. Fish; Wildlife Service (U.S. Department of the Interior, Bureau of Land Management, Boise District, 1982)

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Societatum litterae (R. Friedländer, 1893)

Some account of the fauna and flora of Sinai, Petra, and Wâdy 'Arabah - Hart, Henry Chichester, 1847 -1908 (Pub. for the Committee of the Palestine exploration fund by A. P. Watt, 1891)

Some account of the fauna and flora of Sinai, Petra, and WÃ¢dy 'Arabah - Hart, Henry Chichester, 1847 -1908 (Pub. for the Committee of the Palestine Exploration Fund by A.P. Watt, 1891)

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Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1977)

Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1982)

Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1983)

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A spring and summer in Lapland - Old bushman, 1815 -1865 (Groombridge, 1871)

The standard catalogue of North American birds eggs - Lattin, Frank H. (Frank Haak), 1861 -1937 (F.H. Lattin, 1892)

The standard natural history - Kingsley, J. S. (John Sterling), 1854 -1929 (S.E. Cassino and company, 1885)

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The structure of man an index to his past history - Wiedersheim, Robert, 1848 -1923 (Macmillan and co, 1895)

A student's text-book of zoology - Shipley, A. E. Sir, (Arthur Everett), 1861 -1927 (S. Sonnenschein and co, 1898)

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Studies in forestry; being a short course of lectures on the principles of sylvi-culture delivered at the Botanic garden, Oxford - Nisbet, John, 1853 -1914 (Clarendon Press, 1894)

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A study of the incubation periods of birds; what determines their lengths - Bergtold, W. H. (William Harry), 1865 -1956 (The Kendrick-Bellamy co, 1917)

A study of the structure of feathers, with reference to their taxonomic significance - Chandler, Asa C. (Asa Crawford), 1891 -1958 (University of California press, 1916)

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Stuttgarter Beiträge zur Naturkunde - Staatliches Museum für Naturkunde in Stuttgart (Das Museum, 1968)

Summary narrative of an exploratory expedition to the sources of the Mississippi River, in 1820: resumed and completed, by the discovery of its origin in Itasca Lake, in 1832. By authority of the United States. With appendices, comprising ... all of the official reports and scientific papers of both expeditions - Schoolcraft, Henry Rowe, 1793 -1864 (Lippincott, Grambo, and co, 1855)

The summer birds of Hazelton, British Columbia - Taverner, P. A. (Percy Algernon), 1875 -1947 (s.n, 1919)

Summer birds of the Chiricahua Mountains, Arizona - Tanner, James T. (James Taylor) (American Museum of Natural History, 1958)

The summer birds of the northeast shore of Lake Superior, Ontario - Royal Ontario Museum of Zoology. (Printed by the University of Toronto Press, 1943)

The summer birds of Yakutat Bay, Alaska - Royal Ontario Museum of Zoology. (Royal Ontario Museum of Zoology], 1939)

Summer camp with notes on the marine invertebrates of L'Etang Harbor and the neighbouring waters - Ganong, William Francis, 1864 -1941 (s.n, 1885)

Summer population and food ecology of jaegers and snowy owls on Bathurst Island, N.W.T. emphasizing the long-tailed jaeger - Taylor, Philip Scott. (University of Alberta, Dept. of Zoology, 1974)

The summit of the years - Burroughs, John, 1837 -1921 (Houghton Mifflin company, 1913)

Supplement to the American ornithology of Alexander Wilson : Containing a sketch of the author's life ... - Ord, George, 1781 -1866 (J. Laval and S.F. Bradford, 1825)

Supplement to The birds of Lincolnshire, 1954-1968 - Cornwallis, R. K. (Richard K.) (Lincolnshire Naturalists' Union, 1970)

A supplementary list of the marine fishes of India : with descriptions of 2 new genera and 8 new species - Alcock, A. (Alfred), 1859 -1933 (Asiatic Society, 1897)

The survey of western Palestine. The fauna and flora of Palestine - Tristram, H. B. (Henry Baker), 1822 -1906 (The Committee of the Palestine Exploration Fund, 1884)

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Svenska foglarna - Åkerlund, Peter, 1835 -1871 (Tryckt hos J. & A. Riis, 1885)

Svenska foglarna - Åkerlund, Peter, 1835 -1871 (Tryckt hos J. & A. Riis, 1886)

Syllabus of lectures on the vertebrata - Cope, E. D. (Edward Drinker), 1840 -1897 (For the University of Pennsylvania, 1898)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1981)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1983)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1985)