Authors: 1950
- Lázár, Béla 1869-1950
- Lehmann, Friedrich J. (Friedrich Johann) 1866-1950
- Leitzmann, Albert 1867-1950
- Livingstone, W. P. (William Pringle) 1864-1950
- Lumley, Savile -1950
- Lyford, Philip 1887-1950
- Lynn, Escott 1866-1950
- Macalister, Robert Alexander Stewart 1870-1950
- MacCulloch, J. A. (John Arnott) 1868-1950
- Mann, Heinrich 1871-1950
- Manninen, Otto 1872-1950
- Masters, Edgar Lee 1868-1950
- McHugh, John A. (John Ambrose) 1880-1950
- Mela, Eino 1881-1950
- Michaëlis, Karin 1872-1950
- Millay, Edna St. Vincent 1892-1950
- Miller, Charles Conrad 1880-1950
- Moffat, Alfred 1866-1950
- Moody, Katharine Twining 1867-1950
- Moore, J. Hampton (Joseph Hampton) 1864-1950
- Myddleton, W. H. (William Henry) 1873-1950
- Naylor, Charles Wesley 1874-1950
- Newton, Joseph Fort 1876-1950
- Nichols, Spencer Baird 1875-1950
- Nijland, J. Aleida 1870-1950
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