Scottish birds - Scottish Ornithologists' Club (Scottish Ornithologists' Club, 2020)

Scottish birds - Scottish Ornithologists' Club (Scottish Ornithologists' Club, 2021)

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The Scottish naturalist (T. Buncle & Co. [etc.], 1914)

The Scottish naturalist (T. Buncle & Co. [etc.], 1915)

The Scottish naturalist (T. Buncle & Co. [etc.], 1916)

The Scottish naturalist - Perthshire Society of Natural Science. (Cowan & Co. [etc.], 1881)

The Scottish naturalist (T. Buncle & Co. [etc.], 1917)

The Scottish naturalist (T. Buncle & Co. [etc.], 1918)

The Scottish naturalist (T. Buncle & Co. [etc.], 1921)

Scottish Naturalist - Scottish Natural History Library. (Scottish Natural History Library, 1991)

The Scottish naturalist (T. Buncle & Co. [etc.], 1926)

The Scottish naturalist (T. Buncle & Co. [etc.], 1927)

Scottish Naturalist - Scottish Natural History Library. (Scottish Natural History Library, 1994)

The Scottish naturalist (T. Buncle & Co. [etc.], 1949)

The Scottish naturalist (T. Buncle & Co. [etc.], 1951)

The Scottish naturalist (T. Buncle & Co. [etc.], 1952)

The Scottish naturalist (T. Buncle & Co. [etc.], 1954)

The Scottish naturalist (T. Buncle & Co. [etc.], 1955)

The Scottish naturalist (T. Buncle & Co. [etc.], 1956)

The Scottish naturalist (T. Buncle & Co. [etc.], 1957)

Scottish Naturalist - Scottish Natural History Library. (Scottish Natural History Library, 2005)

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The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1947)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1962)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1963)

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, 1967)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1968)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1971)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1973)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1974)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1975)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1976)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1982)

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, 1985)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1986)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1988)

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, 1991)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1992)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1993)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1994)

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, 1998)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 1999)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2000)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2001)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2002)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2003)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2004)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2005)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2007)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2008)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2009)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2010)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2012)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2013)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2014)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2015)

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, 2017)

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

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2021)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2022)

The Sea swallow - Royal Naval Bird Watching Society. (Printed by W. Spurrell for the Royal Naval Bird Watching Society, 2023)

Sex and internal secretions - Allen, Edgar, 1892 -1943 (Williams & Wilkins, 1961)

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Sitzungsberichte der Mathematisch-Physikalischen Klasse der Bayerischen Akademie der Wissenschaften zu München - Bayerische Akademie der Wissenschaften. Mathematisch-Physikalische Klasse. (Die Akademie, 1923)

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

Skandinavisk fauna - Nilsson, Sven, 1787 -1883 (Tryckt uti Borlingska Boktryckeriet, 1820)

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)

Skogsvårdsföreningens tidskrift - Föreningen för skogsvård (Sweden) (Centraltryckeriet, 1907)

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

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

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1878)

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1904)

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

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

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1961)

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

Smithsonian miscellaneous collections - Smithsonian Institution (Smithsonian Institution, 1965)

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South Pacific birds - Du Pont, John E. (John Eleuthère), 1938 -2010 (Delaware Museum of Natural History, 1976)

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Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1951)

Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1952)

Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1962)

Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1966)

Special scientific report. Wildlife - U.S. Fish; Wildlife Service (The Service, 1969)