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- Library of Congress. Photoduplication Service.2
- Lockshin, Larry.2
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- Mace, William H. (William Harrison), 1852-1938.2
- Magdoff, Harry.2
- Maguire, Gregory.2
- Mahony, Bertha E., editor.2
- May, Sophie, 1833-1906.2
- Means, Florence Crannell, 1891-1980.2
- Melich, Tanya.2
- Miller, Henry, 1891-1980.2
- Mills, Alden B. (Alden Brewster), 1903-1969.2
- Monsell, Helen Albee, 1895-2
- Morse, Jedidiah, 1761-1826.2
- Morse, Samuel Finley Breese, 1791-1872.2
- Mott, Edward Harold, 1845-2
- Muench, David.2
- Murray, Philip, 1886-1952.2
- National Association for the Advancement of Colored People.2