British birds - Thorburn, Archibald, 1860 -1935 (Longmans, Green, 1915)

British Ornithologists' Club occasional publications - British Ornithologists' Club. (British Ornithologists' Club, 1997)

Brockhaus' Konversations-Lexikon (F.A. Brockhaus, 1893)

Brockhaus' Konversations-Lexikon (F.A. Brockhaus, 1894)

Buceros : ENVIS newsletter : avian ecology and inland wetlands - Bombay Natural History Society. (Bombay Natural History Society, 1997)

Buceros : ENVIS newsletter : avian ecology and inland wetlands - Bombay Natural History Society. (Bombay Natural History Society, 1998)

Buceros : ENVIS newsletter : avian ecology and inland wetlands - Bombay Natural History Society. (Bombay Natural History Society, 2001)

Buceros : ENVIS newsletter : avian ecology and inland wetlands - Bombay Natural History Society. (Bombay Natural History Society, 2002)

Buceros : ENVIS newsletter : avian ecology and inland wetlands - Bombay Natural History Society. (Bombay Natural History Society, 2003)

Buceros : ENVIS newsletter : avian ecology and inland wetlands - Bombay Natural History Society. (Bombay Natural History Society, 2004)

Buceros : ENVIS newsletter : avian ecology and inland wetlands - Bombay Natural History Society. (Bombay Natural History Society, 2013)

Buceros : ENVIS newsletter : avian ecology and inland wetlands - Bombay Natural History Society. (Bombay Natural History Society, 2017)

Buletinul Societății de Șciințe din Bucureșci, România = Bulletin de la Société des sciences de Bucarest, Roumanie - Societatea de Științe din București. (Societatea, 1892)

Bulletin - East Africa Natural History Society. (East Africa Natural History Society, 2001)

Bulletin - United States National Museum (G.P.O, 1927)

Bulletin de la Société d'histoire naturelle de Colmar - Société d'histoire naturelle de Colmar. (Société d'histoire naturelle de Colmar, 1895)

Bulletin de la Société impériale des naturalistes de Moscou - Moskovskoe obshchestvo liubitelei prirody. (Société impériale des naturalistes de Moscou, 1879)

Bulletin de la Société impériale des naturalistes de Moscou - Moskovskoe obshchestvo liubitelei prirody. (Société impériale des naturalistes de Moscou, 1885)

Bulletin de la Société impériale des naturalistes de Moscou - Moskovskoe obshchestvo liubitelei prirody. (Société impériale des naturalistes de Moscou, 1886)

Bulletin de la Société impériale des naturalistes de Moscou - Moskovskoe obshchestvo liubitelei prirody. (Société impériale des naturalistes de Moscou, 1889)

Bulletin de la Société impériale des naturalistes de Moscou - Moskovskoe obshchestvo liubitelei prirody. (Société impériale des naturalistes de Moscou, 1890)

Bulletin de la Société impériale des naturalistes de Moscou - Moskovskoe obshchestvo liubitelei prirody. (Société impériale des naturalistes de Moscou, 1892)

Bulletin de la Société philomathique de Paris - Société Philomathique de Paris. (Société philomathique de Paris, 1911)

Bulletin de la Société portugaise des sciences naturelles - Sociedade Portuguesa de Ciências Naturais. (Société portugaise des sciences naturelles, 1910)

Bulletin de la Société d'histoire naturelle du Département de la Moselle - Société d'histoire naturelle de la Moselle. ([s.n.], 1855)

Bulletin de la Société fribourgeoise des sciences naturelles : compte-rendu - Société fribourgeoise des sciences naturelles (Imprimerie Ant. Henseler, 1904)

Bulletin de la Société linnéenne de Bordeaux - Société Linnéenne de Bordeaux. (La Société, 2001)

Bulletin de la Société zoologique de France - Société zoologique de France. (La Société, 1876)

Bulletin de la Société zoologique de France - Société zoologique de France. (La Société, 1879)

Bulletin du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (Impr. nationale, 1902)

Bulletin du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (Impr. nationale, 1895)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1909)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1919)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1931)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1938)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1952)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1953)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1961)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1967)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1968)

Bulletin du Muséum national d'histoire naturelle - Muséum national d'histoire naturelle (France) (Imprimerie nationale, 1969)

Bulletin - New York Zoological Society - New York Zoological Society. (New York Zoological Society, 1935)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 1998)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 1999)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2000)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2001)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2003)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2004)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2005)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2006)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2008)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2009)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2010)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2011)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2013)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2014)

Bulletin of the African Bird Club - African Bird Club. (African Bird Club, 2016)

Bulletin of the Amateur Entomologists' Society - Amateur Entomologists' Society (Great Britain) (Amateur Entomologists' Society, 2001)

Bulletin of the British Museum (Natural History) Zoology - British Museum (Natural History) (BM(NH), 1988)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1892)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1905)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1907)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1909)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1910)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1911)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1920)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1930)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1931)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1934)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1942)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1957)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1959)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1963)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1969)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1973)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1978)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1981)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1982)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1999)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 2003)

Bulletin of the British Ornithologists' Club - British Ornithologists' Club. (British Ornithologists' Club, 1893)

Bulletin of the Natural History Society of Maryland - Natural History Society of Maryland (The Society, 1942)

Bulletin of the Nuttall Ornithological Club - Baird, Spencer Fullerton, 1823 -1887 (The Club, 1880)

Bulletin / Oriental Bird Club - Oriental Bird Club. (the Club, 1990)

Bulletin / Oriental Bird Club - Oriental Bird Club. (the Club, 1995)

Bulletin / Oriental Bird Club - Oriental Bird Club. (the Club, 1997)

Bulletin / Oriental Bird Club - Oriental Bird Club. (the Club, 1998)

Bulletin / Oriental Bird Club - Oriental Bird Club. (the Club, 2001)

Bulletin / Oriental Bird Club - Oriental Bird Club. (the Club, 2002)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1981)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1982)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1984)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1987)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1988)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1989)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1990)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1991)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1992)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1993)

Bulletin / Ornithological Society of the Middle East - Ornithological Society of the Middle East. (Ornithological Society of the Middle East, 1994)

Bulletin / Ornithological Society of Turkey - Ornithological Society of Turkey. (Ornithological Society of Turkey, 1969)

Bulletin / Ornithological Society of Turkey - Ornithological Society of Turkey. (Ornithological Society of Turkey, 1970)

Bulletin / Ornithological Society of Turkey - Ornithological Society of Turkey. (Ornithological Society of Turkey, 1974)

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California condors in the 21st century - American Ornithologists' Union. (Nuttall Ornithological Club, 2007)

The Cambridge natural history - Harmer, S. F. (Sidney Frederic), 1862 -1950 (Macmillan and co., limited, 1899)

The Cambridge natural history - Harmer, S. F. (Sidney Frederic), 1862 -1950 (Macmillan and co., limited, 1900)

The Canadian field-naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1976)

Cassell's book of birds - Brehm, Alfred Edmund, 1829 -1884 (Cassell, Petter and Galpin, 1875)