| Author | Titles | | 1.
| Horsham, Michael | 2 | | 2.
| Horsin-Déon, Léon | 1 | | 3.
| Horsley, Gerald C. | 1 | | 4.
| Horst, 1906-1999 | 0 | | 5.
| Author is: Horst, Horst P., 1906-1999 | 1 | | 6.
| Horst, Horst P., 1906-1999 | 1 | | 7.
| Horst, Hugo | 1 | | 8.
| Horst, Louis | 1 | | 9.
| Horst, Richard J. | 1 | | 10.
| Hörster, Heinrich Ewald | 1 | | 11.
| Horster, Maria Antónia Ferreira | 1 |
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