Scottish birds - Scottish Ornithologists' Club (Scottish Ornithologists' Club, 2011)

Scottish birds - Scottish Ornithologists' Club (Scottish Ornithologists' Club, 2013)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1964)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1978)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1979)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1981)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1983)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1987)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1989)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1995)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1996)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1997)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2011)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2016)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2018)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2019)

The Seaside sparrow, its biology and management : proceedings of a symposium held at Raleigh, North Carolina 1-2 October 1981 - U.S. Fish; Wildlife Service (The Survey, 1983)

The second book of birds; bird families - Miller, Harriet Mann, 1831 -1918 (Houghton, Mifflin, 1901)

Second instalment of American ornithological bibliography - Coues, Elliott, 1842 -1899 ([Govt. Print. Office], 1879)

The sequence of plumages and moults of the passerine birds of New York - Dwight, Jonathan, Jr., 1858 -1929 (New York Academy of Sciences, 1900)

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

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton, Mifflin, 1895)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton, Mifflin and Co, 1902)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton Mifflin and company, 1914)

Signs and seasons - Burroughs, John, 1837 -1921 (Houghton, Mifflin and Company, 1901)

The Siphonaptera of Canada - Canada. Department of Agriculture. (1949)

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)

Skandinaviens inseckter : en handbok i entomologi, till allmänna läroverkens tjenst - Thomson, C. G. (Carl Gustav), 1824 -1899 (Malmström & Komp's Boktryckeri, 1885)

A sketch of the natural history (vertebrates) of the British Islands : With a concise bibliography of popular works relating to the British fauna, and a list of field clubs and natural history societies in the United Kingdom - Aflalo, Frederick George 1870 -1918 (W. Blackwood and Son, 1898)

A sketch of the natural history (vertebrates) of the British Islands. With a concise bibliography of popular works relating to the British fauna, and a list of field clubs and natural history societies in the United Kingdom - Aflalo, Frederick George 1870 -1918 (W. Blackwood and Son, 1898)

Slides and photographs. List 29, Birds of New York State - University of the State of New York. Visual Instruction Division. (1920)

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

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1864)

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

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1880)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1881)

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

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1917)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1920)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1946)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1951)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1952)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1957)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1962)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1984)

Smithsonian year - Smithsonian Institution (Smithsonian Institution, 1969)

Snag habitat management : proceedings of the symposium, June 7-9, 1983, Northern Arizona University, Flagstaff - Davis, Jerry W. (Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 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)

Societas entomologica - International Entomological Society. (A. Kernan [etc.], 1894)

Soil and vegetation inventory of Wagner Natural Area, Alberta - Alberta. Alberta Environment. (Geowest Environmental Consultants Ltd, 2000)

South Carolina. Resources and population. Institutions and industries - Hammond, Harry, (Walker, Evans & Cogswell, printers, 1883)

South Cascades late successional reserve assessment - U.S. Fish; Wildlife Service (U.S. Department of Agriculture, Forest Service, 1998)

South Coast draft resource management plan revision and draft environmental impact statement - United States. Bureau of Land Management. Palm Springs-South Coast Resource Area. (U.S. Department of the Interior, Bureau of Land Management, California Desert District, Palm Springs-South Coast Resource Area, 1994)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2006)

Southeastern biology - Association of Southeastern Biologists. (Association of Southeastern Biologists, 2014)

Special bulletin - Smithsonian Institution (Government Printing Office, 1895)