Names
- Kellogg, Frank B. (Frank Billings), 1856-1937.1
- King, Judson, 1872-19581
- King, Judson, 1872-1958.2
- Krishna Menon, V. K. (Vengalil Krishnan), 1897-1974.2
- Ladd, George Trumbull, 1842-1921.2
- Lajpat Rai, Lala, 1865-1928.2
- Life Conservation League. Dept. of Loyalty to Law.1
- Little, Clarence C. (Clarence Cook), 1888-1
- Lloyd, Alfred H. (Alfred Henry), 1864-1927.1
- Lorch, Emil, 1870-1963.1
- Luce, Henry Robinson, 1898-1967.1
- Mabie, Henry Clay, 1847-1918.2
- Malthusian League for Human Welfare through Birth Control.1
- Manny, Frank Addison, 1868-1954.2
- Martineau, James, 1805-1900.2
- McMillan, James, 1838-1902.2
- Mead, Edwin Deak, 1849-1937.1
- Mead, Edwin Doak, 1849-1937.2
- Mead, Lucia True Ames, 1856-1936.2
- Michener, Earl C. (Earl Cory), 1876-1957.1