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- "A House Divided" Speech - West's Encyclopedia of American Law
- Åbo - The Columbia Encyclopedia, 6th ed.
- Āṇṭāḷ - The Concise Oxford Dictionary of World Religions
- Āṭānatiyā - The Concise Oxford Dictionary of World Religions
- Ābhāsa-caitanya - The Concise Oxford Dictionary of World Religions
- Ācāra - The Concise Oxford Dictionary of World Religions
- Ācāra-ȧga - The Concise Oxford Dictionary of World Religions
- Ācariya-muṭṭhi - The Concise Oxford Dictionary of World Religions
- ḥabad - The Concise Oxford Dictionary of World Religions
- ḥaber - The Concise Oxford Dictionary of World Religions
- ‘Abādites - The Concise Oxford Dictionary of World Religions
- ‘Abbās - The Concise Oxford Dictionary of World Religions
- ‘Abbās Effendi - The Concise Oxford Dictionary of World Religions
- ‘Abbāsids - The Concise Oxford Dictionary of World Religions
- ʿĀʾisha bint Abī Bakr - The Concise Oxford Dictionary of World Religions
- ʿAṭṭār, Farīd al-Dīn - The Concise Oxford Dictionary of World Religions
- ʿAbd - The Concise Oxford Dictionary of World Religions
- ʿAbd al-Bahā - The Concise Oxford Dictionary of World Religions
- ʿAbd al-Jabbār - The Concise Oxford Dictionary of World Religions
- ʿAbd al-Karīm al-Jīlī - The Concise Oxford Dictionary of World Religions
- ʿAbd al-Muṭṭalib ibn Hāshim - The Concise Oxford Dictionary of World Religions
- ʿAbd al-Qādir al-Jīlī - The Concise Oxford Dictionary of World Religions
- ʿAbd al-Rāziq, ʿAlī - The Concise Oxford Dictionary of World Religions
- ʿAbd Allāh ibn Maimūn al-Qaddāḥ - The Concise Oxford Dictionary of World Religions
- ʿAbd Allah ibn Yāsīn - The Concise Oxford Dictionary of World Religions
- À Kempis - The Concise Oxford Dictionary of World Religions
- à deux - Oxford Dictionary of Rhymes
- à deux cordes - The Concise Oxford Dictionary of Music
- à deux mains - The Concise Oxford Dictionary of Music
- à deux temps - The Concise Oxford Dictionary of Music
- à la - The Oxford Pocket Dictionary of Current English
- à la corde - The Concise Oxford Dictionary of Music
- à la mode - The Oxford Pocket Dictionary of Current English
- à la pointe darchet - The Concise Oxford Dictionary of Music
- à outrance - Oxford Dictionary of Rhymes
- 'Abd al-Hamid Ben Badis - Encyclopedia of World Biography
- -able - The Concise Oxford Dictionary of English Etymology
- -ac - The Concise Oxford Dictionary of English Etymology
- -acal - The Concise Oxford Dictionary of English Etymology
- -aceae - A Dictionary of Ecology
- -aceae - A Dictionary of Plant Sciences
- -acean - The Concise Oxford Dictionary of English Etymology
- -aceous - The Concise Oxford Dictionary of English Etymology
- -acious - The Concise Oxford Dictionary of English Etymology
- -acy - The Concise Oxford Dictionary of English Etymology
- A & A - The Oxford Dictionary of Abbreviations
- a & b - The Oxford Dictionary of Abbreviations
- A & NI - The Oxford Dictionary of Abbreviations
- A & SH - The Oxford Dictionary of Abbreviations
- A *Teens - Contemporary Musicians
- a 2 - The Oxford Dictionary of Abbreviations
- A and E medicine - A Dictionary of Nursing
- a battuta - The Concise Oxford Dictionary of Music
- A Beginning Point - Fly Fishing: The Lifetime Sport
- A Boolean Search Example - Computer Sciences
- A Bout de Souffle - International Dictionary of Films and Filmmakers
- A Brighter Summer Day - International Dictionary of Films and Filmmakers
- A Communications Revolution - American Eras
- a cta. - The Oxford Dictionary of Abbreviations
- A Day in the Country - International Dictionary of Films and Filmmakers
- A Dialogue Between Piumbukhou and His Unconverted Relatives (c. 1671, by John Eliot) - Dictionary of American History
- a due corde - The Concise Oxford Dictionary of Music
- A Fortiori - West's Encyclopedia of American Law
- a fortiori - Oxford Dictionary of Rhymes
- A Hard Day's Night - International Dictionary of Films and Filmmakers
- A Heart in Winter - International Dictionary of Films and Filmmakers
- A History of the Presidency - Presidents: A Reference History
- A Hospital for the “Distracted” - American Eras
- A House Divided (17 June 1858) - Dictionary of American History
- A House Divided: North vs. South - American Eras
- A House Dividing - American Eras
- A Letter from Wovoka (1890) - Dictionary of American History
- A level - The Oxford Dictionary of Abbreviations
- A Man Escaped - International Dictionary of Films and Filmmakers
- A Matter of Life and Death - International Dictionary of Films and Filmmakers