- Mary, Blessed Virgin, Saint, in the liturgy--Orthodox Eastern Church1
- Masorah1
- Massachusetts--Northampton1
- Massachusetts--Williamstown1
- Materia medica, Animal1
- Mathematics, Arab5
- Mathematics, Greek1
- Maḥṣūl fī uṣūl al-fiqh (Rāzī, Fakhr al-Dīn Muḥammad ibn ʻUmar)1
- Medicine3
- Medicine, Arab5
- Menelaus, of Alexandria. Spherica1
- Metaphysics2
- Michigan--Kalamazoo2
- Middle East3
- Middle East--Jerusalem1
- Miftāḥ al-ʻulūm (Sakkākī, Yūsuf ibn Abī Bakr)2
- Miscellanea3
- Mishneh Torah (Maimonides, Moses)2
- Missals6
- Missing leaves2