Authors: H.
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- Hoyt, H. S. (Herman Simeon) 1868-1961
- Hubback, J. H. (John Henry) 1844-
- Hubbard, Douglass H. 1918-2011
- Huddilston, John H. (John Homer) 1869-1956
- Hudson, Henry Norman 1814-1886
- Hudson, W. H. (William Henry) 1841-1922
- Hughes, H. Millicent 1863-1942
- Hume, H. Harold (Hardrada Harold) 1875-1965
- Hummel, Abraham H. 1849-1926
- Humphreys, Henry Noel 1810-1879
- Humphreys, John H. -
- Hunt, Henry 1773-1835
- Hunt, H. Ernest (Harry Ernest) -
- Hunt, Joseph Hill 1848-1911
- Hunt, William Holman 1827-1910
- Hurlbut, Edward H. 1880-1954
- Hutchinson, H. N. (Henry Neville) 1856-1927
- Huth, Alfred Henry 1850-1910
- Hutton, Edward, Sir 1848-1923
- Hutton, J. H. (John Henry) 1885-1968
- Hutton, Richard Holt 1826-1897
- Hutton, William Holden 1860-1930
- Huxley, Thomas Henry 1825-1895
- Huygens, Constantijn 1596-1687
- Hyatt, Alfred H. (Alfred Henry) 1871-1911