Authors: G
- Harper, Charles G. (Charles George) 1863-1943
- Harper, George McLean 1863-1947
- Harris, Augustus, Sir 1852-1896
- Harris, George Frederick 1862-1906
- Harrison, Grace Clergue 1869-1944
- Harris, Thomas L. (Thomas LeGrand) 1863-1941
- Harry, G. Bryan -
- Hart, George 1839-1891
- Hart, Grace -
- Harting, G. W. (George William) 1877-1958
- Hartley, C. Gasquoine (Catherine Gasquoine) 1867-1928
- Hartmann, Eduard von 1842-1906
- Hartmann, George 1852-1934
- Hartmann, Walther Georg 1892-1970
- Hartridge, Gustavus 1849-1923
- Hartswick, F. Gregory (Frederic Gregory) 1891-
- Hartwig, G. (Georg) 1813-1880
- Harvey, Gideon -
- Harvey, William 1578-1657
- Haslam, George 1858-1923
- Hastings, E. G. (Edwin George) 1872-1953
- Hastings, George Gordon -
- Hatfield, Garold S. -
- Hatfield, Gordon -
- Hauberrisser, Georg Joseph, Ritter von 1841-1922
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