- Marriage (Canon law)1
- Marriage (Canon law)--Dispensations1
- Marriage law1
- Martial1
- Mary, Queen of Scots, 1542-15871
- Massachusetts1
- Massachusetts--Northampton1
- Massachusetts--Wellesley1
- Maximilian I, Holy Roman Emperor, 1459-15191
- Maḥzor1
- Medici, Alessandro de', 1510-15371
- Medici, Bernardo d'Alamanno de'1
- Medicine, Magic, mystic, and spagiric1
- Medicine--Formulae, receipts, prescriptions1
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- Mediterranean Sea1
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- Merit (Jewish theology)1
- Meteorologica (Aristotle)1
- Meteorology1