| Save | Year | Entries | |
| Exposition universelle internationale de 1900 (Paris, France) : Gervais, Prosper | 1900 | 1 | |
| Exposition universelle internationale de 1900 (Paris, France). Denmark : Denmark. | 1900 | 1 | |
| Exposition universelle internationale de 1900 (Paris, France) -- Portugal : Costa, B. C. Cincinnato da | 1900 | 1 | |
| Expoziția universală și internațională de la Liège (1905) -- See Exposition universelle et internationale (1905 : Liège, Belgium) | 1 | ||
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| Expression -- 4 Related Subjects | 4 | ||
| Expressive arts therapy -- See Arts Therapeutic use | 1 | ||
| Extension work, Agricultural -- See Agricultural extension work | 1 | ||
| Exterior lighting -- See also Garden lighting | 1 | ||
| Extermination, Jewish (1939-1945) -- See Holocaust, Jewish (1939-1945) | 1 | ||
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Extermination of pests -- See Pests Control --subdivision Control under individual and groups of pests, e.g. Rats--Control; Plant parasites--Control |
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| Extinct animals -- See also Extinction (Biology) | 1 | ||
| Extinct animals : Ley, Willy, | 1941 | 1 | |
| Extinct animals -- North America : La Rocque, Aurèle, | 1960 | 1 | |
| Extinct animals -- West Indies : Varona, Luis S | 1974 | 1 | |
| Extinct birds | 2 | ||
| Extinct birds -- Islands of the Indian Ocean : Strickland, H. E. | 1848 | 1 | |
| Extinct mammals -- Western Hemisphere : Allen, Glover M. | 1942 | 1 | |
| Extinct plants -- See also Plants Extinction | 1 | ||
| Extinct vertebrates -- See also Extinct birds | 1 | ||
| Extinction (Biology) -- 2 Related Subjects | 2 | ||
| Extinction (Biology) | 2 | ||
| Extinction of plants -- See Plants Extinction | 1 | ||
| Plants -- Extinction | 3 | ||
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Extirpated animals -- See Extinct animals --headings for individual extinct animals and groups of extinct animals |
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Extirpated species -- See Extinct animals --headings for individual extinct animals and groups of extinct animals |
1 | ||
| Extirpation (Biology) -- See Extinction (Biology) | 1 | ||
| Extra-uterine pregnancy -- See Ectopic pregnancy | 1 | ||
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Extrachromosomal DNA -- See also Viruses --subdivision Viruses under individual animals and groups of animals and individual plants and groups of plants, e.g. Cattle--Viruses; Fishes--Viruses; Corn--Viruses |
1 | ||
| Extracting teeth -- See Teeth Extraction | 1 | ||
| Extraction (Chemistry) | 6 | ||
| Extraction (Dentistry) -- See Teeth Extraction | 1 | ||
| Teeth -- Extraction : Fischer, Martin, | 1955 | 1 | |
| Extracts -- See also Plant extracts | 1 | ||
| Extracts | 5 | ||
| Extracts -- Therapeutic use : DeFeudis, F. V | c1998 | 1 | |
| Extraordinary ray -- See Refraction, Double | 1 | ||
| Extrasensory perception -- See also Telepathy | 1 | ||
| Extrasensory perception : Puharich, Andrija | 1959 | 1 | |
| Extraterrestrial life -- See Life on other planets | 1 | ||
| Extrauterine pregnancy -- See Ectopic pregnancy | 1 | ||
| Extreme environments -- See also Arid regions | 1 | ||
| Extreme environments -- Alaska -- North Slope : Huryn, Alexander D | c2012 | 1 | |
| Exudation (Botany) -- See also Plants Transpiration | 1 | ||
| Eye -- See also Vision | 1 | ||
| Eye | 3 | ||
| Eye -- Accommodation and refraction | 10 | ||
| Eye -- Anatomy | 2 | ||
| Eye -- Care and hygiene : Angell, Henry C. | 1878 | 1 | |
| Eye -- Diseases | 48 | ||
| Eye Diseases and defects -- See Eye Diseases | 1 | ||