Authors: Hans
- Frederiksen, H. C. (Hans Christian) 1840-1921
- Freimark, Hans 1881-1945
- Gadow, Hans 1855-1928
- Gamon, Hannibal -
- Ganz, Hans 1890-1957
- Geer, Charles 1922-2008
- Geldart, Thomas, Mrs. 1819-1861
- Goodyear, R. A. H. (Robert Arthur Hanson) -
- Gordon, Hanford Lennox 1836-1920
- Gould, Hannah Flagg 1789-1865
- Grasberger, Hans 1836-1898
- Grimmelshausen, Hans Jakob Christoph von 1625-1676
- Gross, Hans 1847-1915
- Guan, Hanqing -
- Guenther, Johannes von 1886-1973
- Gumppenberg, Hanns, Freiherr von 1866-1928
- Haan, Jacob Israël de 1881-1924
- Hager, Hermann 1816-1897
- Hämeenniemi, Hanna 1882-1942
- Hamilton, Hans Claude 1811-1895
- Han, Bangqing 1856-1894
- Hanbury, Daniel 1825-1875
- Hancock, H. Irving (Harrie Irving) 1868-1922
- Handcock, Percy S. P. (Percy Stuart Peache) -
- Handel, George Frideric 1685-1759
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