Subjects: RE (sorted alphabetically by title)
- Middle class -- France -- Retirement -- Fiction
- Milan (Italy) -- History -- Revolution of 1848
- Military reconnaissance
- Mineral resources conservation -- United States
- Mines and mineral resources
- Mines and mineral resources -- Arizona
- Mines and mineral resources -- Brazil
- Mines and mineral resources -- California
- Mines and mineral resources -- California, Southern
- Mines and mineral resources -- Colorado -- Fiction
- Mines and mineral resources -- Fiction
- Mines and mineral resources -- Illinois
- Mines and mineral resources in art
- Mines and mineral resources -- Juvenile fiction
- Mines and mineral resources -- Laos
- Mines and mineral resources -- New Mexico -- Taos County
- Mines and mineral resources -- Ontario
- Mines and mineral resources -- South Africa
- Mines and mineral resources -- Texas -- Folklore
- Mines and mineral resources -- Thailand
- Miniature painting -- Reproduction
- Minnesota -- History -- Civil War, 1861-1865 -- Regimental histories
- Missions -- Appalachian Region
- Missouri -- History -- Civil War, 1861-1865 -- Regimental histories
- Missouri Infantry. 9th Regiment -- 1861-1862