- Grover, Burton Baker, 1858- author1
- Grund, Marie, author1
- Haden, Russell Landram, 1888-1952, author1
- Haeckel, Ernst, 1834-1919, author1
- Hall, G. Stanley (Granville Stanley), 1844-1924, author1
- Hall, Maurice C. (Maurice Crowther), 1881-1938, author1
- Harrow, Benjamin, 1888-1970, author1
- Harrower, Henry R., 1883-1953, compiler1
- Hart, Robert W. (Robert Watson), 1889- author1
- Hegner, Robert W. (Robert William), 1880-1942, author1
- Heller, E. P. (Edward Peter), 1892-1948, author1
- Hess, Julius H., 1876-1955, author1
- Hewlett, Albion Walter, 1874-1925, author1
- Hexter, Maurice Beck, 1891-1990, author1
- Hill, Dorothy Dix, author1
- Hill, Lewis Webb, 1889-1968, author1
- Hines, Harlan Cameron, 1887-19741
- Hoffman, Mabel E., author1
- Hoffman, U. J. (Urias John), 1855- author1
- Hogan, Louise E. (Louise Eleanor), 1855-1929, author1