| Author | Titles | | 1.
| Horst, Louis | 1 | | 2.
| Horst, Richard J. | 1 | | 3.
| Hörster, Heinrich Ewald | 1 | | 4.
| Horster, Maria Antónia Ferreira | 1 | | 5.
| Hörster, Maria António | 2 | | 6.
| Hörster, Maria António Henriques Jorge Ferreira | 0 | | 7.
| Author is: Hörster, Maria António | 2 | | 8.
| Horster, Marita | 1 | | 9.
| Horstman, Neil W. | 1 | | 10.
| Horstmann, Brigitte | 1 | | 11.
| Horswell, Edward | 1 |
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