Supplementary report on the Hydroids of the Scottish National Antarctic Expedition - Royal Society of Edinburgh. (R. Grant & Son, 1909)

Supplementum tentaminis pteridographiae, continens genera et species ordinum dictorum marattiaceae, ophioglossaceae, osmundaceae, schizaeaceae et lygodiaceae - Presl, K. B. 1794 -1852 (E typographia Cass. reg. Aulica filiorum Amadei Haase, 1849)

The suppressed sawdust report - Rogers, W. H. (s.n.], 1889)

A survey of natural areas in Tyrrell County, North Carolina : for The North Carolina Natural Heritage Program, Coastal Natural Area Inventory Project - North Carolina. Coastal Energy Impact Program. (North Carolina Coastal Energy Impact Program, Office of Coastal Management, North Carolina Dept. of Natural Resources and Community Development, 1982)

Survey of rare vascular plants in Fidler-Greywillow Wildland Provincial Park - Alberta. Parks; Protected Areas Division. (Alberta Community Development, Parks and Protected Areas, 2005)

Sylloge algarum omnium hucusque cognitarum - Toni, Giovanni Battista de, 1864 -1924 (Typis Seminarii, 1889)

Sylloge algarum omnium hucusque cognitarum - Boston Society of Natural History. (Sumptibus auctoris, 1889)

Sylloge algarum omnium hucusque cognitarum - Boston Society of Natural History. (Sumptibus auctoris, 1892)

Sylloge algarum omnium hucusque cognitarum - Boston Society of Natural History. (Sumptibus auctoris, 1895)

Sylloge algarum omnium hucusque cognitarum - Boston Society of Natural History. (Sumptibus auctoris, 1905)

Sylloge algarum omnium hucusque cognitarum - Boston Society of Natural History. (Sumptibus auctoris, 1907)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1882)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1788)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1889)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1897)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1902)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1926)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1928)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1931)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1973)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1977)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1978)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1979)

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, 1984)

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

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1986)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1991)

Syllogeus - National Museum of Natural Sciences (Canada) (National Museum of Natural Sciences, 1995)

The sylva Americana; or a description of the forest trees indigenous to the United States, practically and botanically considered - Massachusetts Horticultural Society (William Hyde & Co, 1832)

A synonymic index-catalogue of spiders of North, Central and South America with all adjacent islands, Greenland, Bermuda, West Indies, Terra del Fuego, Galapagos, etc - Petrunkevitch, Alexander, 1875 -1964 (Published by order of the Trustees, for sale at the Museum, 1911)

Synopsis der mitteleuropaïschen flora - Graebner, Paul, 1871 -1933 (W. Engelmann, 1896)

Synopsis hepaticarum : coniunctis studiis scripserunt et edi curaverunt - Gottsche, Karl Moritz, 1808 -1892 (Meissnerianis, 1844)

Synopsis methodica stirpium Britannicarum : in qua tum notae generum characteristicae traduntur, tum species singulae breviter describuntur: ducentae quinquaginta plus minus novae species partim suis locis inseruntur, partim in appendice seorsim exhibentur : cum indice & virium epitome - Ray, John, 1627 -1705 (Prostant apud Sam. Smith ad insignia principis in coemeterio D. Pauli, 1690)

A synopsis of the Accipitres (diurnal birds of prey) : comprising species and subspecies described up to 1920, with their characters and distribution - Gray, George Robert, 1808 -1872 (Priv. print. for the author, 1921)

A synopsis of the birds of North America - Audubon, John James, 1785 -1851 (Adam and Charles Black, 1839)

... Synopsis of the described Lepidoptera of North America. Part I–Diurnal and crepuscular Lepidoptera - Morris, John G. (John Gottlieb), 1803 -1895 (Smithsonian institution, 1862)

A synopsis of the family Unionidae - Lea, Isaac, 1792 -1886 (H.C. Lea, 1870)

A synopsis of the family Unionidae - Lea, Isaac, 1792 -1886 (H. C. Lea, 1870)

Synopsis of the naviculoid diatoms. Presented to the R. Swedish Academy of Sciences May 10, 1893 - Cleve, P. T. (Per Teodor), 1840 -1905 (Norstedt, 1894)

Synopsis of the neuroptera of North America with a list of the South American species - Hagen, Hermann August, 1817 -1893 (Smithsonian Institution, 1861)

Synopsis of the North American Syrphidae - Williston, Samuel W. (Samuel Wendell), 1851 -1918 (G.P.O, 1886)