- Agriculture--Accounting1
- Agriculture--Economic aspects1
- Ajurrūmīyah (Ibn Ājurrūm, Muḥammad ibn Muḥammad)1
- Al-Munajjim al-Kashi, Yahya ibn Imad bin Yahya1
- Albertus de Fontanella1
- Albigenses1
- Alchemy--Bibliography1
- Aldobrandini, Giovanni degli1
- Alessandri, Alessandro degli1
- Alessandri, Niccolò degli1
- Alessandro, Pietro di1
- Alexius, Saint1
- Alfonso V, King of Aragon, 1396-14581
- Alimony (Islamic law)1
- Allegories1
- Allegory1
- Alleluias (Chants)1
- Almagest (Ptolemy)1
- Almanach perpetuum celestium motuum (Zacuto, Abraham ben Samuel)1
- Almanacs, German1