Subjects: history
- Mechanical engineering -- History
- Mecklenburg County (N.C.) -- History
- Medicine -- England -- London -- History -- 19th century
- Medicine -- Europe -- History
- Medicine -- Great Britain -- History
- Medicine -- History
- Medicine -- History -- 18th century
- Medicine -- History -- 19th century
- Medicine -- History -- 20th century -- Mesopotamia
- Medicine -- Kentucky -- History
- Medicine, Military -- Confederate States of America -- History
- Medicine, Military -- History
- Medicine -- Netherlands -- History
- Medievalism -- England -- History -- 18th century
- Medievalism -- England -- History -- 19th century
- Medievalism -- Scotland -- History -- 18th century
- Memory (Philosophy) -- History
- Mennonites -- Hymns -- History and criticism
- Mentally ill -- Commitment and detention -- Illinois -- History -- 19th century
- Mentally ill -- Commitment and detention -- New York (State) -- History -- 19th century
- Merchant marine -- Germany -- History
- Merchant marine -- Great Britain -- History
- Merchant marine -- United States -- History
- Mercia (Kingdom) -- History
- Messina (Italy) -- History
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