| Author | Titles | | 1.
| Helfferich | 1 | | 2.
| Helfferich, Karl, 1872-1924 | 2 | | 3.
| Helfferich, Karl Theodor, 1872-1924 | 0 | | 4.
| Author is: Helfferich, Karl, 1872-1924 | 2 | | 5.
| Helfman, Patricia Masters | 1 | | 6.
| Helft, Claude | 1 | | 7.
| Helft, Jacques | 1 | | 8.
| Helfting, Paul | 1 | | 9.
| Helg, Franca | 1 | | 10.
| Helga Photo Studio Inc. (Estúdio de Fotografia) | 1 | | 11.
| Helgeson, Susanne, 1964- | 2 |
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