- Lutheran Church--Controversial literature--Catholic authors1
- Manuscripts1
- Manuscripts, German13
- Manuscripts, Italian1
- Manuscripts, Latin11
- Manuscripts, Latin (Medieval and modern)4
- Manuscripts, Medieval3
- Manuscripts, Renaissance19
- Manuscripts, Spanish1
- Melanchthon, Philip, 1497-1560. De officio principum1
- Middle High German, 1050-15001
- Military art and science1
- Miscellanea1
- Missals17
- Missals (Service books)1
- Missing leaves2
- Missions, Portuguese1
- Music--Manuscripts1
- Musical notation20
- New Jersey--Princeton2