Authors: 1920
- Gorgas, William Crawford 1854-1920
- Guiney, Louise Imogen 1861-1920
- Hanly, J. Frank (James Frank) 1863-1920
- Hardy, E. J. (Edward John) 1849-1920
- Harrison, Burton, Mrs. 1843-1920
- Hawkins, Rush C. (Rush Christopher) 1831-1920
- Hawley, W. A. (Walter Augustus) 1863-1920
- Heinemann, William 1863-1920
- Herbert, Frank 1920-1986
- Hervey, Mary F. S. (Mary Frederica Sophia) 1853-1920
- Heulhard, Arthur 1849-1920
- Houghton, Louise Seymour 1838-1920
- Houssay, Frédéric 1860-1920
- Howell, Ithamar M. (Ithamar Martindale) 1866-1920
- Howells, William Dean 1837-1920
- Hunt, Bernice Kohn 1920-
- Huybers, John Alfred 1859-1920
- Hytönen, Sulo M. 1870-1920
- James, Henry B. 1841-1920
- Järvinen, Eero 1860-1920
- Järv, Jaak 1852-1920
- Johns, C. H. W. (Claude Hermann Walter) 1857-1920
- Johnson, Charles P. (Charles Philip) 1836-1920
- Johnston, R. M. (Robert Matteson) 1867-1920
- Jokinen, Wäinö 1879-1920
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