- Landowners1
- Landscape photography4
- Law firms1
- Letterheads1
- Letterpress printing1
- Lumber trade1
- Lynching1
- Lynchings1
- Mexican American children1
- Mexican American farmers1
- Mexican American women1
- Mexican Americans3
- Mexican War, 1846-18481
- Migrant agricultural laborers1
- Mineral industries8
- Miners19
- Mines and mineral resources6
- Miniature books2
- Miniature books--Specimens2
- Mining camps4
Libraries & Collections
- Arts Library
- Bass Library
- Beinecke Library
- Classics Library
- Divinity Library
- Film Study Center
- Fortunoff Archive
- Humanities Collections
- International Collections
- Law Library
- Lewis Walpole Library
- Library Collection Services
- Manuscripts & Archives
- Map Collection
- Marx Science & Social Science Library
- Medical Library
- Music Library
- Sterling Library
- Yale Center for British Art
