| Save | Year | Entries | |
| Automatic control | c1971 | 1 | |
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Automation -- See also Automatic control --subdivision Automatic control under individual technical processes and equipment, e.g. Refrigeration and refrigerating machinery--Automatic control |
1 | ||
| Buildings -- Irrigation -- Automation : Snyder, Stuart D., | c1995 | 1 | |
| Automatism : Mühl, Anita M. | 1930 | 1 | |
Your entry Automobile racing -- Fiction would be here
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| Automobile travel -- Kentucky -- Red River Gorge -- Guidebooks : Ruchhoft, Robert H | c1986 | 1 | |
| Autonomic agents -- See Autonomic drugs | 1 | ||
| Autonomic drugs -- 4 Related Subjects | 4 | ||
| Autonomic drugs : Broadley, Kenneth J | c1996 | 1 | |
| Autonomic ganglia | 1980 | 1 | |
| Autonomic nervous system -- See also Sympathetic nervous system | 1 | ||
| Autonomic nervous system | 3 | ||
| Autonomy -- History : McClelland, Charles E., | 2014 | 1 | |
| Autopsy : London Medical Society of Observation | 1866 | 1 | |
| Autopsy -- Method : Box, Charles R | 1910 | 1 | |
| Autoserotherapy -- See Autotherapy | 1 | ||
| Autosuggestion -- See Mental suggestion | 1 | ||
| Autotherapy : Duncan, Charles H | c1918 | 1 | |
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Autotomy -- See also Regeneration (Biology) --subdivision Regeneration under individual organs and regions of the body, e.g. Foot--Regeneration |
1 | ||
| Autotoxaemia -- See Auto-intoxication | 1 | ||
| Autumn -- Juvenile literature : Thijsse, Jac. P. | 1908 | 1 | |
| Autumnal catarrh -- See Hay fever | 1 | ||
| Paleobotany -- France -- Autun : Renault, Bernard, | 1878 | 1 | |
| Algae, Fossil -- France -- Auvergne : Héribaud Joseph, | 1908 | 1 | |
| Beetles -- France -- Auvergne : Bruyant, C | 1902 | 1 | |
| Botany -- France -- Auvergne | 5 | ||
| Diatoms, Fossil -- France -- Auvergne : Héribaud Joseph, | 1908 | 1 | |
| Diatoms -- France -- Auvergne | 2 | ||
| Ground beetles -- France -- Auvergne : Bruyant, C | 1902 | 1 | |
| Botany -- France -- Auvergne Region | 2 | ||
| Tiger beetles -- France -- Auvergne : Bruyant, C | 1902 | 1 | |
| Auxiliary sciences of history -- 4 Related Subjects | 4 | ||
| Auxin | 2 | ||
| Ava (Beverage) -- See Kava (Beverage) | 1 | ||
| Ava (Plant) -- See Kava plant | 1 | ||
| Availability of health services -- See Health services accessibility | 1 | ||
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Availability, Water -- See Water-supply --subdivision Water-supply under topical headings |
1 | ||
| Avena -- See Oats | 1 | ||
| Avena sativa -- See Oats | 1 | ||
| Avenzoar, -1162 -- See Ibn Zuhr, ʻAbd al-Malik ibn Abī al-ʻAlāʼ, -1162 | 1 | ||
| Avenzoar, d. 1161 -- See Ibn Zuhr, ʻAbd al-Malik ibn Abī al-ʻAlāʼ, -1162 | 1 | ||
| Botany -- France -- Aveyron : Bras, Antoine, | 1877 | 1 | |
| Avgustin, Blazhennyĭ, Saint, Bishop of Hippo -- 2 Related Subjects | 2 | ||
| Avian anatomy -- See Birds Anatomy | 1 | ||
| Aviaries | 2 | ||
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Aviary birds -- See Cage birds --names of individual cage birds, e.g. Canaries |
1 | ||
| Aviation medicine -- See also Space medicine | 1 | ||
| Avicena, 980-1037 -- See Avicenna, 980-1037 | 1 | ||
| Avicenna, 980-1037 : Chishti, G. M. | c1988 | 1 | |
| Avicenne, 980-1037 -- See Avicenna, 980-1037 | 1 | ||
| Avicenniaceae | 2 | ||