| Save | Year | Entries | |
| Barley -- Diseases and pests | 2 | ||
| Barley -- Genetics | c2002 | 1 | |
| Wild flowers -- Wales -- Barmouth : Kynoch, James | 1887 | 1 | |
| Barnacles : Stott, Rebecca | 2003 | 1 | |
Your entry Barnard, Anne Lindsay, Lady, 1750-1825 would be here
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| Barneby, R. C. -- See Barneby, Rupert C | 1 | ||
| Barneby, Rupert C : Crase, Douglas | c2004 | 1 | |
| Barnes Brothers Nursery Company : Barnes Brothers Nursery Company | 1927? | 1 | |
| Barnes Garden Center : Barnes Garden Center | 1964 | 1 | |
| Barnes, Importers : Barnes, Importers | 1950 | 1 | |
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Barnyard animals -- See Domestic animals --subdivision Domestic animals under ethnic groups |
1 | ||
| Barollaea -- See Caryocar | 1 | ||
| Barometer -- See Barometers | 1 | ||
| Barometers -- See also Aneroid barometers | 1 | ||
| Barometers : Decharme, J. Constantin | 1861 | 1 | |
| Barometric hypsometry -- See also Aneroid barometers | 1 | ||
| Barometric pressure -- See Atmospheric pressure | 1 | ||
| Baroque gardens -- See Gardens, Baroque | 1 | ||
| Barr & Son (London, England) : Barr & Son (London, England) | 1949 | 1 | |
| Botany -- Catalogs and collections -- Italy -- Barra : Tenore, Michele, | 1845 | 1 | |
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Barrages -- See also Dams --subdivision Effect of dams on under individual animals and groups of animals, e.g. Fishes--Effect of dams on |
1 | ||
| Barrés, Carlos Juan Finlay y, 1833-1915 -- See Finlay, Carlos J. (Carlos Juan), 1833-1915 | 1 | ||
| Barrett's Bridge Nurseries : Barrett's Bridge Nurseries | 1972 | 1 | |
| Barrier island ecology -- Atlantic Coast (U.S.) : Lippson, Robert L | c2009 | 1 | |
| Barrier island ecology -- Georgia : Martin, Anthony J., | 2020 | 1 | |
| Barrier islands -- Georgia -- History : Martin, Anthony J., | 2020 | 1 | |
| Birds -- Panama -- Barro Colorado : Chapman, Frank M. | 1938 | 1 | |
| Botany -- Panama -- Barro Colorado Island | 2 | ||
| Barro Colorado Island (Panama) : Croat, Thomas B | 1978 | 1 | |
| Plant spores -- Panama -- Barro Colorado Island -- Identification : Roubik, David W. | c1991 | 1 | |
| Pollen -- Panama -- Barro Colorado Island -- Identification : Roubik, David W. | c1991 | 1 | |
| Natural history -- Panama -- Barro Colorado : Chapman, Frank M. | 1938 | 1 | |
| Zoology -- Panama -- Barro Colorado : Chapman, Frank M. | 1938 | 1 | |
| Barrow (Alaska) : Laursen, Gary A | 1975 | 1 | |
| Barrow, Mabel Rosalie, 1877-1962 -- See Edge, Rosalie, 1877-1962 | 1 | ||
| Tundras -- Alaska -- Barrow : Laursen, Gary A | 1975 | 1 | |
| Bartholin, Caspar, 1585-1629 : Le Boë, Frans de, | 1681 | 1 | |
| Bartholin, Thomas, 1616-1680 -- Library : Bartholin, Thomas, | 1961 | 1 | |
| Barton, B. S. 1766-1815 -- See Barton, Benjamin Smith, 1766-1815 | 1 | ||
| Barton, Benjamin Smith, 1766-1815 : Ewan, Joseph, | c2007 | 1 | |
| Barton, Benjamin Smith, 1766-1815 -- Bibliography : MacPhail, Ian, | 1986 | 1 | |
| Barton, Clara, 1821-1912 : Oates, Stephen B | 1994 | 1 | |
| Barton, Clara Harlowe, 1821-1912 -- See Barton, Clara, 1821-1912 | 1 | ||
| Barton, Clarissa Harlowe, 1821-1912 -- See Barton, Clara, 1821-1912 | 1 | ||
| Barton, Dr. 1766-1815 -- See Barton, Benjamin Smith, 1766-1815 | 1 | ||
| Barton, Klara, 1821-1912 -- See Barton, Clara, 1821-1912 | 1 | ||
| Barton, Professor 1766-1815 -- See Barton, Benjamin Smith, 1766-1815 | 1 | ||
| Barton, William P. C. (William Paul Crillon), 1786-1856 -- Bibliography : MacPhail, Ian, | 1986 | 1 | |
| Bartonella infections -- Alternative treatment : Buhner, Stephen Harrod | c2013 | 1 | |
| Bartonia : Schenk, John J., | 2020 | 1 | |
| Bartram, Billy, 1739-1823 -- See Bartram, William, 1739-1823 | 1 | ||